i played it for 10 mins at K-Mart, it was ok, i'm not used to playing these types of games so it took me a few mins to figure out the controls and that. What I liked and disliked the most was the battle system. Its a turn based RPG style type battle system, but the rest of the game, at least the part of the game i played, was like a normal platformer.
So it would seem Nintendo blended in the platform game along with the RPG, it looked good, but sadly i didn't have enough time to get into it, and my personal opinion would be to wait until it was a nintendo choice game and is $19.99.