Minuses:
-Easiest songs are 1/2 foot. Hardest songs are 7 foot.
-ONLY 20 SONGS and more than half bite balls
-Waluigi only appears twice and is a nightmarish creature
-Luigi and Mario dance like fruitcakes and look like Disney characters
Pluses:
-In "mush mode" you get random turtle shells, bullets and fireballs to hit, to name only a few examples.
-If you try to dance the exact same way as the characters on the screen (pumping fists and complicated groin/hand thrusts), you will not only look fruity as hell but the difficulty will be greatly increased
-Bowser dances hardcore
-Dancing flaming logs
I didn't like the game very much, just because it was trying to make mario and luigi do something they can't. That, and the music was lame