I'll also admit that I have posted a less than favorable review of Chef Mickey's as well. We visited the last time during a
Free Dining period, so I felt that may have had something to do with the restaurant being so crowded, the poor quality, etc. I still stand behind my opinion, but, it's just that, an opinion.
When I was making my ADRs for our next I struggled with the decision as to whether or not to eat there again. Not for the food, but for the characters. I ended up choosing other options since we've done it twice, and there are other restaurants that we would like to try.
That said, your kids will love the characters and that is what Chef Mickey's, in my opinion, is all about, the characters. As long as you keep that in mind, I'm sure you will have a wonderful time. And especially if you are staying at the Contemporary, I think it would be hard to avoid not eating there.
I hope you enjoy yourselves and have a wonderful trip!