Summary: I love the story line and the music is great as well. The art is different in each level so if you don't like one particular style you aren't stuck with it for the whole game. Peach is actually taking responsibility and although I'm not usually a Peach fan...she's awesome in this game. She should be like this all the time. In addition, Bowser is on your team eventually and is awesome/super useful.
Summary: Not as satisfying as I would think it to be. It also does't have the classic Mario feeling to it, I realize its not supposed to be exactly like the other games. This game is more like a failed experiment or branch of the Mario games. Super Paper Mario involves new enemies and new territory to explore, while the game itself was successful, there may be Mario veterans like myself who dislike the feeling of this game