I've only gotten around to using it because I've had spare time to go on walks in the neighborhood. It's nice to hang out with my brothers, going around and picking up cans while being our obnoxious selves. I sometimes forget the only reason we are on the walk is because of the Pokéwalker.
Still, the blogs upon returning is fun to read. Depending on the Pokémon, it's rather hilarious. (I've had Mewtwo on it for the past few times, so it's a bit weird to read that he wants to jump on my back.)