I got it, and I think it's pretty good. The Miis have arms and more anthropomorphic hands.
It's definitely more fun with a second player, but it's not dead without. Unfortunately, the max is two players. The games are pretty creative, and there are a lot of neat little features all over the place. Like Wii sports, they're simple, but fun and addictive. My favorite so far is fishing. You won't have to get up and move around like many people do with Wii sports, which is good or bad, depending on your preference. None of the games really need that kind of motion. Overall I'd give it an 8/10. Not quite as good as Wii Sports, because it's limited to two players, and because I prefer getting up sometimes. But still worth it, imo, especially with the $10 off coupon at best buy.