Ditto Olivia's. It's not an "event" dining spot, but it's great for a simple, no-fuss meal, and seems miles away from the hubbub and rush of the parks. One of the best deals around is their soup, salad, and sandwich combo for lunch - good, fresh stuff, and less than $10.
I think the fact that a lot of CM's eat there should give you a bit of a clue.