I have a CycleOps JetFluid Pro as well, bought last summer for the rainy days and the inevitable winter days. In retrospect I wish I would have gone with the SuperMagneto Pro so I could adjust the resistance, as I think it's significantly different feeling @ 21mph than my bike is on the open road. At least it's a more challenging workout, it would be unfortunate if it erred on the "too easy" side.