Overall Mario Kart Wii is as good as Brawl in multiplayer, but they need to learn that 150cc is tough enough.
1. Multiplayer
The multiplayer Mario Kart Wii provides is the same as your stereotypical Mario game - fun and addictive. Multiple control forms have made it so anyone can have a good time with this game. Though I haven't played online, I can expect that online play is just as good if not better than local play.
2. Campaign (Grand Prix)
The Campaign is just about as good as coming home from a hard day to eat apple pie to as hard as crashing on the Moon's surface at 1,000,000 MPH. First I did 50cc. No problem I could take the CPUs. Then 100cc. A little bit of trouble but I could dig it. By the time I reached 150cc it seems on my walk to Dry Bowser a meteor suddenly popped out on top of me and crushed my bones and my spirits. I was depressed on how much I lost but after a few multiplayer matches you could ask me about it and I wouldn't even care.
3. Characters
The characters are all great and I appreciate how King Boo was so much easier to unlock than in Double Dash. The Rosalina Bonus, as I call it, was pretty cool though I'd never use her. While not many new ones were added, they all are still great ( However I question why they keep Donkey Kong and Diddy Kong - it was pushing it letting them in Brawl).
4. Conclusion
Mario Kart Wii is a great mix of two of my favorite gaming genres - Mario and racing games. While its not as good in some things as Halo, or any other adventure Mario game you should get it because it will be awhile 'till Nintendo releases another one ( which seems to be when a new console exists). But here's one line to Nintendo - make different games! Halo was amazing and even it was just a trilogy! I would be absolutely DELIGHTED to see a new original series that earns better than a 9.0 here at Gamespot. But don't trust unofficial reviews, this is way better than double dash, so get it if you have a Wii.