Top Studio! Super Personal!
Very chilled, good price, and not full of douches like you'll find at McFit
Got a Urban Sports Abo, which means I can attend many different classes and fitness centers in Berlin, quite interesting when you move out very often.
I must say the courses/classes I've been taking there were among the best ones. Very professional trainers, always punctual. The atmosphere is friendly, and relaxed.
Gemütliche, freundliche Athmosphäre, individuelle gewünschte sportliche Betreuung. Das Studio hat familiäres Fluidum.
There is no where to fill up your water bottle (only warn water at the bathrooms) and you have to buy water at the reception. Complete BS to charge for water at a gym!
Okay
Nice people, not too crowded, moderate prices
Good gym. Was staying in the area, bought a day pass (€14, maybe a a bit expensive but worth it in the end).