I recently finished all of the Adventures in Kinect Adventures. I must say, this game, though it was the first Kinect game I played, still persists to this day to be one of my favorite motion games. It's really easy to get into and other players grasp the game very quickly.
The magic of the Kinect is crazy. I love the workout I get and the rising level of difficulty in Adventures. Sure, it's a little clunky at times, but you're having so much fun it really isn't noticeable after a time.
GRR THOUGH. One of the achievements in the game is to play through EVERY event with a friend. Seeing as though my bro isn't around enough to play all 50+ events...I guess my quest to get 100% in the game stops here.
Also, playing online is fun as crap. I forgot that the mic is on the Kinect, so when I went "Whoo!" and got a reply of, "REMATCH!" I was a bit surprised. :P
Here are my achievements in the game: http://live.xbox.com/en-US/Activity/Details?titleId=1297287405&compareTo=JoJoJoshua