We read that article when it first came out and it definitely played a HUGE role in our decision to dump a lot of money into a Co-Motion tandem with the Periscope rear seat post. Aside from the positive effect it has had on our son, it's a helluvalot of fun. I don't care for riding on the back of the tandem (I can't see squat around my broad-shouldered, 6'2" hubby), but our son is like a pig in mud back there. He sings songs and yells "pedal faster, dad, we can drop mom!" Jerks.![]()