We loved Chef Mickey's. We went twice during our trip the week after Thanksgiving. Once for Breakfast and once for Dinner. I loved the carved roast beef, the mashed potatoes were very yummy as was everything else to go with it. DW would eat there every night if it were up to her.
Breakfast was also good. I liked the breakfast better there than at Donald's Breakfastosaurus at AK. Breakfast pizza,,,,,,,, YUMMMMY!!!
As for the character's. It was by far the BEST of the character meals we did (including Liberty Tree, Donald's Breakfast and Crystal Palace (though CP was also very good)).
Minnie Mouse especially was awesome. Interacting with my 3 1/2 year old DS who was almost terrified of the characters. She was able to bring him out of his shell. He had a Buzz Lightyear blaster and he pretended to shoot her with it and she litterally fell to the ground and pretended to be shot everytime he would shoot it. Then she took it from him and was shooting Mickey and all the waiters. Priceless.
Then a few days later for breakfast Chip got down on the floor and played with my 13 month old DD for a few minutes. We had a late breakfast seating and it wasn't busy. All the characters came by twice during breakfast.