iHow the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 64%83+52.7Reliability 28%80+22.6Replies to reviews 8%100+8.2Experts Score= 84Not enough data for value; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.84SCORE
AGradeiLetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20.
#74 of 94 personal trainersiPosition by Experts Score among all companies we track in this category. · better than 22%
4.8★★★★★210 Google reviews · 24 photos
88%five-star reviews
5.00★last 12 monthsiAverage stars on reviews from the last 12 months only.
3.8%1–2★ in 2 yearsiShare of 1–2★ reviews in the last 24 months — or the 20 newest reviews when the company had fewer than 20 in that time.
Google reviewers rate UltraFlex Fitness 4.8 out of 5 based on 210 reviews, with the owner responding to every comment. Customers frequently praise the knowledgeable staff, clean facilities, and supportive community atmosphere, noting that personal trainers help them achieve specific fitness goals. Common criticisms include loud music, limited equipment availability during peak hours or morning classes, and some aging gear.
Google rating: 4.8 out of 5 from 210 reviews (88% five-star).
Reviews on this page: 210 Google reviews (140 with written comments, 12 with photos).
Owner responses: the business replied to 100% of reviews.
Most recent review: October 9, 2026.
Service: Personal Trainer serving Monrovia, California.
Data from Google, last updated October 28, 2026.
Score profile vs other personal trainers
Score per factor (100 = best)iEach factor is scored 0–100 on absolute terms (star average, share of 1–2★ reviews, price verdicts…); standing within the category can only raise it, never lower it.. Strongest: craft & service and momentum; weakest: reliability.
UltraFlex FitnessPersonal Trainers median0 = centre, 100 = best
SatisfactioniSatisfaction · 54% of the scoreRecency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.UltraFlex Fitness: 83/100 on this factor. Category median: 96.A
83
ReliabilityiReliability · 24% of the scoreHow rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.UltraFlex Fitness: 80/100 on this factor. Category median: 96.A
80
Craft & serviceiCraft & service · penalty only, up to −10 pointsGoogle review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.UltraFlex Fitness: 100/100 on this factor. Category median: 99.A
100
ValueiValue · 14% of the scoreCustomers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Not enough reviews for this factor yet. Category median: 87.–
–
MomentumiMomentum · penalty only, up to −10 pointsPenalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.UltraFlex Fitness: 100/100 on this factor. Category median: 100.A
100
Replies to reviewsiReplies to reviews · 7% of the scoreHow often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.UltraFlex Fitness: 100/100 on this factor. Category median: 72.A
100
Bar = this company · dark tick = category median.
Star ratings
210 Google reviews we collected
4.8of 5
5 stars18488%
4 stars157%
3 stars63%
2 stars21%
1 star31%
Praise vs complaints
Phrases our text analysis found in 140 written reviews
98%praise
Praise9898%
Complaints22%
Topic share
How often each topic comes up in the written reviews
7topics
Staff & attitude5858%
Would recommend1515%
Price & value99%
Quality & results77%
Speed & response55%
Honesty & trust44%
Communication22%
What customers talk about
We read 140 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.
“Lots of resistance equipment, no judgement, free parking, friendly informed staff, trainers available.”
“I would recommend this gym to anyone who is ready to take their training to the next level.”
“Immediately had to buy the year long membership it is an insane deal and well worth it to even come a few times a month as I live pretty damn far!”
“Love the vibe of this gym Jimmy does an outstanding job of making this gym feel alive.”
“If anything happens to any of the equipment, Zac is there to bring it back up and running in no time at all.”
“It’s honestly become one of my favorite parts of my daily routine.”
“Before my first visit Kevin made a great first impression reaching out to set up a tour and was in full communication from the start.”
People customers mention
Kevin7 reviews
Gym5 reviews
Brian3 reviews
praise complaint · found by our text analysis, Google review wording unchanged.
Recent reviews
AAngelina1 reviewiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 3 weeks ago★★★★★
Cristhian has been my trainer for years and has truly helped me become stronger and regain my muscle after knee surgery. I love coming to the gym because of him. Great gym atmosphere
DDensel3 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 3 weeks ago★★★★★
This gym has grown so much since I started working out here. They are always trying to better the space with better equipment and people. Maria's team to keep the gym clean is exceptional. The personal trainers as well really know what their doing. Working out with Cristhian has really improved my overall health,…
EElizabeth5 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 3 weeks ago★★★★★
Cristhian has been a greater trainer at ultraflex. He’s helped me develop my muscle and bone density, as a 68 year old woman that’s been my goal. He’s super dedicated, motivating, and handsome haha!
MMarioLocal Guide · 30 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 2 months ago★★★★★
Solid gym, got myself a day pass to go check it out and i definitely did not get disappointed, if you’re an avid and legit gym goer, this is probably a great location for you. Arsenal and Panatta equipment 10/10. Posing room 10/10.
LLISALocal Guide · 26 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 3 months ago★★★★★
Great place, Great people. Lots of weights/machines. Good sized gym. Delicious fresh made protein drinks. Good products for sale.
MMarianne4 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 4 months ago★★★★★
Great gym to work out in. Lots of resistance equipment, no judgement, free parking, friendly informed staff, trainers available. I’ve been a member for over 15 years.
Cristhian has been my trainer for years and has truly helped me become stronger and regain my muscle after knee surgery. I love coming to the gym because of him. Great gym atmosphere
Response from the owner · 3 weeks ago
Angelina, we love hearing this. Coming back stronger after knee surgery takes a lot of work and consistency, and it sounds like you and Cristhian make a great team. We’re lucky to have him at UltraFlex and even happier that you genuinely enjoy coming in to train. Thank you for the 5 stars! 💪
D
Densel Martinez3 reviewsiTotal number of Google reviews Densel has written across all businesses on Google Maps, not just this one.
This gym has grown so much since I started working out here. They are always trying to better the space with better equipment and people. Maria's team to keep the gym clean is exceptional. The personal trainers as well really know what their doing. Working out with Cristhian has really improved my overall health, and has made me love the gym. There are so many more other trainers that deserve shoutouts!
Response from the owner · 3 weeks ago
Hi Densel! You definitely get what we’re trying to do here. We never want UltraFlex to feel “finished” there’s always another piece of equipment to add, something to improve, or another way to make the gym better. Really appreciate you recognizing Maria and her too. She works incredibly hard and deserve the shoutout. And it’s great to hear the impact Cristhian has had on your training and overall health. Thanks for being along for the ride as we keep building this place! 💪
E
Elizabeth Gutierrez5 reviewsiTotal number of Google reviews Elizabeth has written across all businesses on Google Maps, not just this one.
Cristhian has been a greater trainer at ultraflex. He’s helped me develop my muscle and bone density, as a 68 year old woman that’s been my goal. He’s super dedicated, motivating, and handsome haha!
Response from the owner · 3 weeks ago
Elizabeth, this is wonderful to hear! Building strength and maintaining muscle and bone density is so important, and we love seeing members continue to get stronger at every age. Cristian will be very happy to hear this as well. Keep up the great work, we’re happy to have you as part of UltraFlex! 💪❤️
M
Mario PazLocal Guide · 30 reviewsiTotal number of Google reviews Mario has written across all businesses on Google Maps, not just this one.
Solid gym, got myself a day pass to go check it out and i definitely did not get disappointed, if you’re an avid and legit gym goer, this is probably a great location for you. Arsenal and Panatta equipment 10/10. Posing room 10/10.
Response from the owner · 2 months ago
Love this review, Mario! Glad you came in and put the gym through its paces. We’ve put a lot into building an equipment lineup for people who take their training seriously, so the 10/10 on the Arsenal, Panatta and posing room means a lot. We just added Megamass and Citadel Hi Row is on its way from Australia as we speak. Thanks for checking us out, hope that day pass turns into a regular stop! 💪
L
LISA DOMINGUEZLocal Guide · 26 reviewsiTotal number of Google reviews LISA has written across all businesses on Google Maps, not just this one.
Great place, Great people. Lots of weights/machines. Good sized gym. Delicious fresh made protein drinks. Good products for sale.
Response from the owner · 3 months ago
Lisa, thank you so much for the wonderful review! I am glad you enjoyed not only the gym and equipment, but also our shakes. We work hard to create a place where people can get everything they need under one roof. I truly appreciate you taking the time to share your experience 🙏
Brian
M
Marianne Wallace4 reviewsiTotal number of Google reviews Marianne has written across all businesses on Google Maps, not just this one.
Great gym to work out in. Lots of resistance equipment, no judgement, free parking, friendly informed staff, trainers available. I’ve been a member for over 15 years.
Response from the owner · 4 months ago
Marianne, thank you for being part of this gym family for more than 15 years. You’ve seen us through different locations, different eras, and plenty of changes along the way. Your review means a lot to us al. We truly appreciate your loyalty and support over all these years. See you in the gym! (PS I hope you enjoyed the protein shake).
Brian & everyone at UltraFlex Fitness.
R
Richard Bailey2 reviewsiTotal number of Google reviews Richard has written across all businesses on Google Maps, not just this one.
I have been training at Ultraflex for over a year and I can see the thriving and supportive community that this gym has built. It is always clean and the staff and trainers are attentive and knowledgeable in meeting the members’ needs, whether it’s general information about health and fitness or prepping for a bodybuilding competition. I would recommend this gym to anyone who is ready to take their training to the next level.
Response from the owner · 5 months ago
Richard, thank you for taking the time to write this.
What you described is exactly what we’ve worked hard to build here, a place where someone can come in for general health and fitness or step onstage for a bodybuilding show and feel equally supported.
Appreciate you being part of the UltraFlex community for the past year. Respect.
🙏 Brian
J
James Haulcomb1 reviewiTotal number of Google reviews James has written across all businesses on Google Maps, not just this one.
If you’re looking for a solid gym, and killer vibe look no further! Usually me and my boys love coming here around 6-8pm and the vibes are always great! Jimmy puts the cherry on top at this gym, he always has the best playlist, and keeps good vibes!
Response from the owner · 5 months ago
James, appreciate that.
6–8pm crew always brings the energy… you and your boys included. That’s a big part of what makes that time of night what it is.
Glad you found your spot here. See you guys in the evening.
Brian
H
Hall of Fame Baseball Cards4 reviewsiTotal number of Google reviews Hall has written across all businesses on Google Maps, not just this one.
I am not a gym person. Never have been. But there came a time recently when I wanted to start trying different things in life. Healthy, productive things. So, when I started looking around for a gym at which I might feel comfortable, I naturally came across UltraFlex because they are so close to my business and home. I was intimidated, but when I walked up to the front desk, Kevin greeted me very politely and was very welcoming, offering to show me around the gym. I asked about Personal Trainers, told him what I was looking to accomplish, and he connected me with Amellio. The rest is history. I have now been going to UltraFlex quite steadily for over a year, and anyone who knows me, knows that is a massive change for the better. Amellio has been great! Very personable, funny and very knowledgeable, comfortable around the gym. Super easy to get along with. Whether you are a beginner like me or a gym regular, I highly recommend him if you are looking for a PT. He and everyone who works on staff, other trainers and regulars have all contributed to my willingness to return week after week. To Brian, Jen, Kevin, Amellio and everyone else who I have met at UltraFlex... THANK YOU! You are all wonderful. -EriK
Response from the owner · 7 months ago
Wow! This was great to read. Thank you Erik.
Coming from someone who didn’t see themselves as a “gym person,” the fact that you’ve been consistent for over a year says everything. That’s a big change, and you earned it.
Kevin does a great job making people feel comfortable from the start, and Amelio has a way of meeting people where they’re at and getting them moving forward.
But the biggest part of this is you, showing up, sticking with it, and making it part of your life.
Really glad you walked through our doors.
Brian
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Abi Betch2 reviewsiTotal number of Google reviews Abi has written across all businesses on Google Maps, not just this one.
Loving this gym, sometimes gyms with pictures and trophies on the wall can be intimidating, but all that melts away when you’re met with the kind and welcoming attitude of the owners and the front desk manager Kevin, staff is beyond polite and really make you feel like you belong there. Very clean and tidy too.
Response from the owner · 7 months ago
Abi, 🙏 I really appreciate you saying that.
We know the walls, the history, the atmosphere can feel intimidating at first… but the goal has always been the opposite, for people to walk in and feel like they belong here.
Kevin does a great job setting that tone from the start. It’s who he is. So genuine.
Glad you felt it. That’s exactly what UltraFlex is about.
Brian
