We went for Breakfast and for Dinner in October. Dinner was our first meal there and it was fine. The buffet food was set up and tasted very much like any chain buffet that you go to. Fine food, but nothing really special. You're truly paying for the characters here. I must remember though, I have been spoiled by more gourmet buffets (for Chef Mickey Prices) in Vegas.
The character interaction at dinner felt a little rushed and not very personal. We'd been here for breakfast before (in 2004) and remembered much better character interaction.
We went for breakfast later on in the trip and the interaction was AMAZING! The food was again fine, in my opinion a bit better than the dinner food, but nothing that I'd go rushing back for just to eat again. If you're mostly interested in food, the breakfast buffet at Boma is much cheaper and has food that is as good or better.
However, if you're going for Mickey and the gang - Chef Mickey's Breakfast is the way to go!
Instead of doing breakfast and dinner, I'd suggest two breakfasts in your trip. They're a little less expensive, food quality is decent and interaction is amazing!