Mario kart is a game that anyone can pick up and play. Also Mario kart is the best party game to date.
A new thing that has been added to this edition of mario kart is motor cycles, now you can race two wheels, or four wheels and do huge tricks ands wheelies.
Another thing that has been added is the online play. Yes you need friend codes but even if you chose random you can get a game running in under 1 minute. Also you and your friend can be online at the same time with the same wii so you can take on the world together.
Some things that dissappoint veterans of the series is the lack of Co-op in the Grand prix mode. But you can always do Vs. and chose any four tracks you want.
Another big letdown was the battle mode. You can only be on a team, there is no free for all, which upsets many people.
The controls for this game are spot on. There are four different controllers to choose from. Wii-mote sideways and use motion controls (these work perfectly), the gamecube controller, classic controller or wiimote and nunchuck combo. With all of these different setups it will not be hard to find one that suits you.
Finally the unlockables. There are 25 characters that you can unlock, these characters are put into 3 different catagories. Light, medium, and heavy depending on there weight. What weight class you chose determines what bikes/Karts you use as well. Different vehicles handle differently so you have to chose what suits you best.
There are 32 tracks in the game. 16 new, and 16 classic. The new tracks are crazy in terms of boosts, jumps, things going on during the track etc. The old tracks bring back the good times of other mario kart days.
Mario kart wii would have been the best in the series if it focuses a little more on the offline multiplayer (co-op GP, battlemode). But altogether it is a very good game, and if you dont have it yet go pick it up now because you will spend hours and hours of fun times on it.