We have eaten dinner at Chef Mickey's, breakfast at O'hana's (w/ Lilo & Stitch), along with dinner at O'hana's.
We only enjoyed Chef Mickey's for the character interaction (and location.) My DS & DD were dressed up as Mickey & Minnie (looking pretty spectacular, might I add.)

They seemed to get extra special attention because of this--including several pics w/ Minnie & Mickey together.
But, that was the best of it. The food was pretty -blah-. We were so disappointed. We pretty much just stuck with the salad bar & fruit, because the hot items were gross. (Maybe it was a bad night???) We are all MEAT eaters, and it was pretty bad for my DH to stick with the raw veggies & fruit!
Now, for O'hana's, we absolutely, positively LOVED IT!!!

The characters were so fun & crazy at the breakfast. Pluto & Stitch chased each other around the restaurant & "fought" the whole morning. That juice was to die for (can't remember what it was made of??)
Our dinner at O'hana's was incredible, also. The food was delicious, and we (almost) had a window table to watch the fireworks. We were so close, that we didn't miss anything at all. And, our kiddos had so much fun playing all of the "Hawaiian" type games.
We are going back to WDW in June, and we made SURE to book O'hana's for breakfast
and dinner (but chose to steer clear of CM.)
102 Days till we're living our Dreams at the World!