Agree with the previous two post.
Good at the start but has drastically declined recently - Huge Cash Cow...
Forget going during the peak times (unless you're happy to wait 15-20min to get on your equipment), you just wont get the most out of your membership.
The sales guy also did a damn good job on me when I joined and stuffed me for a two year membership, telling me I could cancel after the first year if I wanted, by giving three months notice (my fault for not reading the contracts t&c's - lesson learnt). The two years are now coming to an end and I'm glad to be seeing the back of this place.
Their are a load of other places in Zurich which are less crowded, equally equipped and a lot cheaper.
But if you do decide to go, I would be more than happy to sell you my 'Holmes Place' branded pad lock for the locker room...
Good luck,
APx