OK ok, let me declare upfront that I HATE SQ for being so lousy with its loyal customer base (ex-PPS who got ditched when wife (read SQ) suddenly contested the pre-nup (changed the T&C of its program))...
This being said, for anyone who travels extensively, I find the G* lounge in T2 and T3 to be adequate. You will find a lot worse in Manila, Jakarta and other geographies I care not to remember.
What upset us all is that SQ tries to tell us it is such a great airline, with superior service, irreproachable ground offering... Have you seen the F lounge in T2? I would be pretty upset if I had used so much dosh for such a poor offering. Garuda who flies from T1 uses the CX lounge and I find it superior to SQ T2 lounge (all of them).