MAS 772s are excellent.Of all the 772s and 773s I've ever flown (CX772, SQ772, MH772, TG773), I have to say that MAS is the best (don't know about their 774 though, their 333 was crap).
The route I travel is BNE-KUL vv. initially they used 333s and there were no PTVs and the seat was very uncomfortable (kinda like the old QF seats) but sometime in 98 or 99 they changed it to 772s daily. The seat was very very soft and comfy, the headrests or the wings were comfortable also. PTV offers many different programmes but I think SQ has the better onboard entertainment.
Surprisingly in terms of seat comfort I find SQ the least comfortable. The headrests are weird (you'll know what I mean if you've ever flown SQ772/773s. Even CX and TG has better seats than SQ... Somebody tell them!!)