Don't get me wrong, I wouldn't actually by the thing. (I was joking note the infinity smilies).
Its cool looking but who wants to pay $50 to play on that bulky thing? After the zombies eat your brains for 50th time you might start regretting your purchasing choice.
My friends and I have all talked about this thing before... And we came to the conclusion that it looks similar in function to the N64 controller which I HATE so FURIOUSLY!!! But it does LOOK kinda neat...
Actually the XBOX controller is quite good, assuming you're using the "Controller-S" version that they released like 6 months after launch. It's like .75 the size and you can actually fit your hands around it.
Really the gamecube controller is the only crappy one right now, even so all it does then is limit developers to having to sculpt the control scheme around it. It just promotes games that only require one button.