It seems that most people on this forum disagree with using a spinner bike, but I bought one a few years ago and have been happy with it. Using a trainer won't damage a good frame, but what I like is that the spinner sits there ready to be used. I don't have to go get my bike and put it in there. I know it doesn't seem like much, but if I already have to ride inside, I want to just get on and go. If you get a nice spinner, you can get it set up really close to your current bike. I still do Spinervals at times with it, and have no problems. It is a little more secure feeling than a bike in a trainer for big sprints, etc. also.