I never erexcise, so I thought I would get one of these and at least try to get some activity in this winter. I have a big touring bike--Probably too big, I'm 5'8). This trainer works fine. It wasn't too hard to put together. The directions picture was a little difficult to make out, but if you have common sense, things should be easy enough. I thought I was totally done in when I had a little difficulty actually hooking the bike into the trainer. I have a chainless bike and there was no nut on the right side. (I think the directions may be a little mixed-up between right and left, too). I thought is was doomed, but i managed to get it together and it works fine. If your are like me, you don't need an expensive trainer. The price is right, it works fine--big bike, no "chain" not much experience.