I bought it today.
It's ok - I mean it's got all the songs and the game is good for what it is.
But the graphics are rubbish and its not the cast that do the backing singing - its some random singers that are quite frankly rubbish.
Plus, you choose solo and do a duet song, expecting the other character to be the one from the film and its not. Which is odd.
Theres a story mode, which is basically "Kelsi" explaining the story, and you go through and sing and unlock different outfits and stuff.
There are some good extra features as well.
Its a good game, but you can tell Disney haven't had all that much input!