I think some people expect this to detect your movement in directions, and translate it on the game. No, you still need to use the nunchuk and hold it down in the direction you are going. Just to confirm, as some may be wondering.
I really like this. I use it on a few single player games and Table Tennis especially. I must admit, I am a fitness junkie. But Jog works really well - which I didn't expect really. Every time you start your jogging on the spot, your character moves on screen. I gave it a 4 star score, as I can see how some would think it is a bit of a gimmick. If you are looking to burn a few more calories while enjoying certain games, I really do recommend it.