I pay Harmony Balexert a visit several times a week and must say it's really a nice gym. A bit more expensive than Silhouette, but the machines work perfectly and there's everything you need to build a good body. Also, the view on the Alps is quite nice. I do not recognize the review posted here in 2008.

"Harmony used to be a good place, but now it is a disaster. Most of the machines are not working well and are out of date. Do not expect the instructors to help or correct you: they are very busy chating or flirting. The worst thing is the lack of hygiene. I do not recommend it."