We saw the show Dec. 30th. I found it was good, but had recycled elements from previous shows we has seen recently -- The Incredibles (same sets from the DisneyWorld show), Princess Dreams, etc. We didn't mind that at all, but someone might.
This was my first ever Disney production where Pinocchio and Dash were Asian and Mulan wasn't. We didn't find it disconcerting, but we did notice.
We didn't have the "Grab Bag" offer spoken of above, but we did find that the souvenirs were also from previous shows, nothing new. We ended up telling ds he already had the things he would like (and he did), so no souvenirs this trip.
I think that especially if you haven't been before, you will love it. Just don't expect Olympic caliber skating. This production is definitely about the characters and story, not triple axels.
Have a great time!