We have had supper at Chef Mickey's twice. My wife and I don't care for the food (at best it is Golden Corral quality), but it is one of the first places my girls mention when I ask them where they want to eat. I hear the breakfast is better.
We ate supper at Chrystal Palace last time we were there and we liked the food much more than Chef Mickey's.
That being said, when we return in October we hope to have ADRs for both places. Now, if Chef Mickey's wasn't a character meal, there is no way we would go.