This Mario Kart really blows me away.
If you are going to be playing in a tournament, or for some reason just need absolutely perfect control, then the Wiimote + nunchuk is the best control type in the game. However, it is not as fun as the wheel.
There is just something very engaging about the Wii Wheel, and it does make the game more enjoyable. There is only one problem I have with the wheel, and it is the timing involved with the drifting.
If you hop and then turn into your drift, you may accidentally turn/drift the opposite direction you desire to go in. It is easy to correct, but it is annoying. If you remember to turn first then you never have that problem...more at least much less likely.
Other than that, the wheel works perfectly, and adds enough stability to the Wiimote to really help your driving. I can't wait to see what it feels like to race Excite Truck with the wheel.
Finally, this Mario Kart has the most creative and elaborate track design of any Mario Kart. And it definitely ramps up the difficulty...having 12 racers compete against you is really insane...specially when they are all bombarding you with weapons.