I have just started using one of these at my physio appointments. It's gentle on my poor legs and fairly enjoyable. I would like to do the same thing at home but am struggling to know what kind to buy. A big one like at my physioterrorist is way out of my price ragne but I have seen some that are just pedals but my husband things that are too light and wouldn't be stable on the floor. Does anyone have one and what do you reccomend?