Weve been to Chef Mickeys a few times now and its always wonderful. Even after trying a couple other character breakfasts, including Cindys, Mickeys remains our favorite. There is a wide variety of food which is always delicious and the character interaction is very good. We always have the best interaction with Goofy. The characters are usually Mickey, Minnie, Pluto, Chip, Dale, and Goofy(he stays at the entrance, he doesnt make the rounds).
On the other hand, at Cindys you get to eat in the castle, and if your kids are big on the princesses, seeing them all would be huge for them. And I really enjoy the food there too...although not as wide a variety as Chef Mickeys.