I'm one of the few people who didnt like the ensemble costumes. I thought they were WAYY too outlandish. Just a personal preference.
I love the music. The OCR was given to me as a birthday present after I read the book and I listened to it nonstop. I wish Norbert got to sing more though :)
As others have said, I didnt like that it was SO different from the book, but it really wouldn't be possible to have a musical made exactly like the book and both be short and age appropriate. I did like the happy ending the musical gave us though, I can't lie. lol