Deb, I'll do my best. I've never ridden on any other roller trainers--in fact have never even seen them in person. The fellow who designed and made these was there. He's a machinist. Anyway there is this rectangular frame. Then another sort of frame is suspended barely inside this. The inside frame contains 2 metal rollers for the front wheel and one for the back wheel. There is another stationary roller in front of the front one, and also one behind the rear one. There are little round bumpers on the end of the stationary bumpers. I was told that these keep you from riding off the trainer if you sorta space out. You can steer left and right a bit, and you really get a feel of riding on a road. When I first got on, I was terribly nervous about it. But after a bit, I relaxed and did better. I still wouldn't let Larry get too far away from me--like practically on the saddle with me! The second time I tried it, it was easier and not so scary. I think that I'd feel confident enough to ride it all by myself with about one more try (maybe 2). It's adjustable in the back for resistance just like the stationary trainers. It's most impressive. Maybe you could email the people on the website, and they could explain it better. One of the ladies in our group had had a roller type trainer that she finally gave away because she never felt secure. She got on this and was greatly surprised at her ability to feel in control. I'm ordering one for myself.