If Forza 3 and Mario Kart got together and had a kid it would be Blur. This game is fun. While racing around the track you try to pick up this power ups and then use them against the other racers.
This is just the demo so I'm not going to do a full review here but for a demo this game is really nice. The demo lets you race against 19 other drives on more than four different tracks.
I spent about an hour playing it last night and had a blast. It's a game that wasn't even on my radar but now I may pick up. The game comes out May 25th.