I saw this article about motorized doping in cycling, and I was quite surprised at the whole thing. As someone who bikes a lot, I don't see much use for something like this. For professionals trying to cheat, I don't see it working, because it makes quite a distinct noise. For older people or people who are trying to get into shape, I can see some advantage. However, even in these situations I think there's too much tendancy to rely on the motor. Even when I'm riding, I find I really have to keep focused and watch my speed, or I'll start slowing down. It's also quite amazing how having another cyclist beside you or up in front can really help to give you that motivation to just push a little harder. So anybody who is really interested in cycling should just tough it out for a bit. you'll get in shape much faster and enjoy the sport that much more. I guess anything thats gets more people out of cars and on to bikes can't be all that bad though.