Woah, no one mentioned the Norway restaurant yet? Always been my favorite since I was a kid. From what I've read in a lot of online reviews, it's typically one of the most highly rated restaurants at WDW.
The style has changed a bit, but it's still all you can eat.
Seriously, where else are you going to get Norwegian food? No offense to everyone else's favorites around Epcot, but it's not that hard to find Japanese, German, Italian, French, British, and especially Mexican restaurants in the real world (I live in Southern CA). Isn't it kind of a waste to go all the way to Epcot just to have Italian food?
Just an opinion