Mario Kart Wii simply is one of the best games in terms of racing. With many new characters, it's really a hot game! ^_^
With a higher character roster than ever and so many courses you might be playing Mario Kart Wii for the rest of your life, not only trying to beat the experts ghost datas, but because the fun never ends in the online play!!
Here's my review's second part: (Price: if it's worth buying or not)
Gameplay: 9.5/10 - Even with many new things and new details, modes are still basically the same, and now Battle is in team and timed.
Graphics: 9.5/10 - Really gives the sensation of a real race.
Audio: 8/10 - Nothing amazing, nothing horrible.
Value: 10/10 - You'll be sure playing it for a really long period of time.
Price: 10/10 - One of the wii's best games even for those that don't like Mario-style games at all.
Total: 9.5 - If this were a book, it would sure be a best-seller.
If you agree/disagree, message me at Gamespot telling why.