I was really excited when I saw this game and came very close to going to Gamestop and buying it. I'm so glad I didn't.
Flat out is not a good game for adults. My wife and I love party games, and this one just did not fit the bill. At least not for adults. I think it may be a little more fun for kids though. It's very cartoony and probably more on a 5 - 10 year old's wave length. When I pick my 5 year old up next week I'm going to let him play it before I return it. I'll see how he likes it.
But if you're looking for a fun party game (and you're of the age where you don't want to go to Chucky Cheese regularly!!)...then this game is probably not for you! But, rent it first if you think it might be...you can always "keep it" for a cheaper price than you'll pay for it at the store.
On a side note, I have been very disapointed with the Move games thus far. They have not lived up to expectations. I got both the Move and Kinect for Christmas from my wife, and so far the Kinect is head and shoulders above the Move on a fun level. The Sports Champions is the only game I've found worth playing so far...and it came with the Move...go figure!