Why does everybody here love MKWii so much? I've played it, the motion controls sucked in my opinion, so I plugged in a Gameube controller. I then got a nice racing experience, especially because I could actually CONTROL the game now.
But still, there were many mistakes made with this game. The tricks for one. Why the F would I stop racing for some dumb SSX-moves? Sure they give you a turbo, but it makes no difference at all: while my opponents were busy making tricks, I just drove on, and they were like exactly as fast as I was. I call that an unneccesary gameplay extension.
But I loved the bikes. I love them better than karts now. And Mariokart Wii had a couple of nice new circuits.
In the end, Mariokart Wii is an decent racing game, and definately fun at parties, but not near as good as Mariokart DS, IMO the best Mariokart to date.