I got it on thursday, and it's the best game I have so far for the wii. It is a massive game that will keep you coming back, it is so addictive plus there is lot's of bonus features etc.
Bad things is that it's annoying when you get stuck and you keep dying, thats the only thing I can think of. Oh and it glitches sometimes,but you won't really notice.
Other then that, once you get used to the controls (I got used to them straight away) you will get addicted!