Great game to stick in with the Wii. Really shows what the Wii can do and the potential that it has.
The game has a good multiplayer mode that is quite fun when you have a quople of friends over and it is cool how your character in the game is your Mii.
It has a neat daily fitness challenge that gives you an age rating that you can compare with your friends.
The motion sensing can get a little akward at times, mainly in the boxing (it sometimes doesn't register swings correctly, or at all for that matter), but it does not really take away from the overall experience. The graphics and sounds aren't really anything spectacular, but it's not like anyone expected them to be. The game really stands out in its gameplay.
For a free game, Wii Sports is great. Good job Nintendo.