The split here is equipment versus front desk
The most useful thing about Academia CMA Mister Rock isn't the 4.5 average across 65 ratings. It's where the good and bad reviews actually disagree. Nobody complains about the training floor. The complaints are about how you get treated at the counter. A March 2023 member laid it out cleanly: "the location, the establishment and the equipment add positive points; however the reception, both the counter clerk and the owner, leave something to be desired. They're careless about pleasing the customer, treating the customer with disregard. For those who like to be treated well, I don't recommend this gym" (translated from Portuguese).
That's a two-star review that still credits the equipment. Read it next to a one-star from September 2024: "terrible experience, the gym owner very unfriendly, seems like we're doing him a favor, I don't recommend" (translated from Portuguese). Two independent voices, roughly 18 months apart, pointing at the same thing, and both aimed at service rather than the gym itself. When two strangers describe the same friction without coordinating, I stop treating it as a bad day and start treating it as a pattern worth planning around.
What the positive reviews are really selling
The five-star reviews are enthusiastic but generic in a specific way. A July 2020 member called it "the best gym in the north zone, 100% recommended, for those who want fast muscle gain, great instructors, the guys really know the subject." A February 2020 review echoed it: "the best gym in the region, for you who want results in a short time, attentive instructors, best value" (both translated from Portuguese). A February 2022 note just said, "space and weight to get monstrous" (translated from Portuguese).
Notice what these praise: instructors who know their stuff, room, and value. Notice what they don't mention: the front desk. So the picture isn't contradictory. The equipment and the trainers earn real praise; the reception is the weak link. Phrases like "best gym in the region" without a named comparison are the kind of line I discount, because they tell you the reviewer is happy, not why you specifically would be.
What the average hides
4.5 out of 65 is solid, but averages smooth over exactly the thing you'd want flagged. The written reviews cluster at the two extremes: five stars for the workout, one and two stars for the owner's manner. If service tone is a dealbreaker for you, the number alone won't warn you. That's why the words matter more than the score here.
What's missing
No review states a price, even though "best value" gets repeated, which is a little frustrating, because value with no number is just a feeling. I won't invent a figure. The posted hours are concrete, though: Monday through Friday 6:00 to 22:00, and Saturday 6:00 to 14:00. That's a long window, good for shift workers and early lifters. There's no website on file, so +55 11 96449-4632 is the line to call for the monthly rate.
Who it's not for
If a warm welcome at the desk is part of what you're paying for, several reviewers tell you plainly that they didn't get it. If you mostly want good equipment, competent instructors, and long hours in the Zona Norte of Sao Paulo, and you can shrug off a brusque front desk, the training-floor reviews are genuinely positive. Go in knowing which half of the experience people rate high.
