I have not tried Sheraton buffet before. But I tried Inter Continental, it is great, manay many foods but little noise because many people. I will try Sheraton buffet on X'mas day.
Well, I tried a few times before, both lunch and tea buffet, I think it's good, I would say they have decent food, but only in reasonable varities, more choices on salad, cakes, ice-creams, have 5 kinds of sashimi, over 10 hot dishes, and more...nice environment, spacious.