Best Mario Kart in the Series yet, great online, great gameplay, great new way to Play.
Tricks: For the first time you can perform tricks by shaking the Wii mote while your in the air, after awhile this starts to feel natural that every-time your in the air you want to get that extra burst of speed.
Bikes: For the first time Bikes are introduced which of course defeats the purpose of calling the game Mario Kart, however thats besides the points, the bikes are a lot faster then Karts, and drifting is a little different then Karts, but once you Master Bikes, your in for a cool treat as you learn how to Wheelie and take the lead.
The Wii Wheel is a great control scheme for those who want to feel their in the game, however most serious gamers prefer the feel of anything with a joystick, and I prefer the Wii mote and Nunchuk control myself.
Online is simply the best, you can play up to 12 people, either worldwide, regional, or friends, and take them to town, the Mario Kart channel is also a great way to connect to see if any friends are online and join a open room, Nintendo has also thought of ideas to play ghosts and time tournaments online which is a great addition to a classic franchise.