Well, you do need to buy a membership, but it´s the same for every gay club or sauna you go to in Italy.
In my case, it was a very good deal, the place was packed with guys, all types, so you are bound to find something you like. I was there for 5 minutes and already hooking up. The facilities are in good shape, and plenty to do. Jacuzzi, pool, gym. If one condom is not enough you can always ask for more. Be adviced that entrance with membership is 30EUR, if you have time to go again is 15EUR thereafter. Bring some ID the first time.

You have to buy a 'membership' in addition to the entrance fee, so not a great deal. The facilities are average, towels cheap - and they don't provide lube! I did manage to find a couple of cute Italian lads to mess around with, but with no lube and the single condom they gave at the door, it didn't go very far. Considering the price of 23 euros, I felt screwed anyway.