It's good. I hate musicals but I liked it.
There was a great article about how nobody was seeing Wicked and it was going to get shutdown until it was made to be a bit more commercial, ticket prices dropped, and tickets given out for free or cheap to a lot of teenaged girls who then ended up liking it so much they told their friends and it became big.
I think they consider it ones of the top Broadway marketing success stories if anyone actually wants to read up on the business aspect of it
-Rudey