I've got about 25 hours on rollers over the last couple years from a training program I've taken. I still need to hang on to get started, but then I'm ok, but still nervous. Just crashed once on my second time. I am usually in my second to top gear 50/13 I think. Cadence around 90, keep my wheel speed at 26 mph or more. I feel more stable at higher speed, but it does take some getting used to.