suck a FUCK, the propellor suit is the best fucking power-up in the game. So goddamn awesome.
if you hate platformers and suck at the game, then yes.
the penguin suit is undeniably the best power up in the game, although you could make an argument for mini-mario. check it: with penguin you make can new platforms by freezing enemies, easily dispatch enemies through sliding or through freezing them (allowing you to do the fun stuff, the platforming), you can skim on water, your traction is better on ice. the only thing cool about the propeller suit is that you look like you're wearing a dunce cap.

the hat sucks balls b/c it breaks the game and allows you to float right on by the best parts of the game. people who liked the raccoon suit and the NSMBds power up, i'm calling you out too.
i love this game to death, though. altho seriously, fuck that shake +1 button crap. unlike swaggaz i love the tilting mechanics that add to the level design, but the multiple uses nintendo assigned to one button (THE WAGGLE BUTTON) is just straight up bad design. with one misplaced shake you can pick up items you didn't mean to, suicide leap off of yoshi, propeller hat your way to your doom, or leap to your death from one of the tilting levels. this game is a 10/10 wrapped in pretty mediocre audio/visuals and some nintendo (read: bone-headed) decisions that leave you scratching your head (no online, no level editor officially, no ability to save replays, only waggle option). so i can understand the 8s to 9s the game is getting and its still the best 2d mario i've ever played.