Picked up and started playing the game a little while ago and so far so good. The Wii wheel that comes with the game is heaver than I expected, but is fun to use. And the online play is flawless. I haven't had any problems logging on or joining a match. Major bonus points to Nintendo for that.
Will be taking this thing with me on a road trip this week- so expect more posts and observations. I will say, it has been interesting switching between this game and Nascar on Fox.