I just got it for my wii (complete impulse buy), and i found it neat how they integrated the remote into the guitar. whenever you make a mistake (of course I never make one ha ha) the sound emits from the remote, not the game. Furthermore, when you have star power the remote vibrates. fun fun.
the only think they didn't change which bugs the hell out of me is if you play lefty the whammy bar is still in a bad position.