I have a Kurt Rock N Roll. It was OK until I bought the extra weighted flywheel, which sortof annoyed me because it wasn't inexpensive in the first place without having to buy an extra $80 add on. It seems quiet enough (I listen to audiobooks on my ipod and I don't have to turn that up unreasonably loud and it doesn't wake up my sleeping kids in the next room). The fact that it can move made me feel more comfortable on putting my new bike on it, but if I had to do over again I'm not positive I would do it based up on the price (although I'm telling myself that my REI member distribution will make it worth it :-))