The Princess Breakfast at Epcot (in the Norway pavillion) is very nice. Cinderella won't be there (she's only at her castle), but a rotating cast of five other princesses will be (when we went it was Snow White, Aurora, Jasmine, Pocohantas and Mulan, but I am told that some of the other princesses are there as well from time to time).
The food is "fixed plate" (meaning, everyone gets the same thing; no ordering off a menu and no buffet) and is passable. But, you don't go for the food, but for the character interaction, which is very nice. You will have a great time.