Pro:
- Cheap memberships even on a monthly basis: $40/mo off-peak, $70 all hours, and less than that if you sign up long-term
- Decent gym equipment (better than ClubFITT, roughly same level as Cali)
- Aircon locker rooms with rainfall showers (woo!)
- Towel service, free soap, hairdryers etc
- Squeaky clean and well maintained
- Mt. Faber has a humongous larger-than-Olympic pool, jacuzzi and steambath, all included in the price
- Zero hard sell for renewing, personal training, yadda yadda (although PTs are available by request)
- Ang mohs are so rare that the staff are all extra friendly to you

Con:
- Singapore PR and citizen only
- No city center locations
- No organized classes (yoga, bodycombat, etc)
- Strictly enforced off-peak hours ("until 5 PM" means you'd better be signed in by 4)
- Water available, but no drinking fountain -- bring your own container!
- Reportedly gets crowded at peak hours (not a problem at all off-peak though, even on weekends)
- Virtually no sexy young ladies in tight spandex

But if you're just looking for a good place to do your workouts, EnergyOne hits the spot.
More info at http://www.safra.sg/page.aspx?pageid=96 .