Quality!
The learning curve to the game is very swift you'll be knocking them out of the park (literally later on) in no time.
There's a lot to the game especially later on when you get to use the motorbike as part of the actual boss levels. If you own a Wii and you are after a game that you can actually finish. (It took me around 13 hours and I have been away from gaming for a long time until the Wii was launched) then I would say this is it.
You can now pick this game up a lot cheaper than it's original launch price, so what you waiting for..go get it!