We were just there a couple of weeks ago for our Fantasmic! Dinner package. Let me say that we were extremely worried that we would hate it, based on the MANY bad reviews I read on this board. I decided to keep our ressies and just try it out. Well, to our surprise, the food was pretty good. Even my DD10, who is quite picky, found items that she enjoyed very much. The service was fine, and the environment was pleasant, not filthy, as others have stated. We had lunch at Crystal Palace on another day, and I would say both buffets are comparable to each other. (We liked CP a lot too!)
I don't know if we just went on a good day, at a good time (5:00pm), but it's interesting to me that we enjoyed our experience, yet others have disliked this buffet so much, that they'd never go back again.