Went in April '10 and we did the following with our two girls who were 6 & 4:
Crystal Palace for breakfast - Was ok not huge fans of Winnie the pooh and friends, our kids were so so with the characters.
Chef Mickey's for dinner - character interaction was awesome. I agree with previous posts, I would go back and will go back just for that.
Garden Grill for Dinner - best meal by far that we had, even though the rotating was not working. Characters were Mickey(in farmer outfit), Pluto and Chip & Dale all were fantastic interacting with the people.
Askerhus for breakfast - My girls loved the princesses, got to see Ariel, Belle, Cinderella, Aurora and Snow White. Food was so so, my sister went for dinner and said it was really good so we are going to try dinner when we go back.
Hollywood & Vine for lunch - food was ok. They had two of the einsteins and JoJo & Goliath when we went, I think Handy Manny is there now. We would have enjoyed it much better if Handy would have been there when we went. My kids did not know who Jo & Goliath were, but are crazy about Handy Manny. They did sing alongs and conga lines and interacted with the kids a lot. If your kid is a playhouse disney fan then I would say this is a definite.
1900 park fare for breakfast - Best breakfast we had by far. Were a little upset because Mary Poppins was sick and not there and my girls wanted to meet her. They sent Snow White in her place so we got to meet her for the 3rd time in one week and actually the exact same snow white for the 2nd time.