Works well can be easily carried around and set up in tight spaces.The only item I would suggest doing is the rubber none slip feet twist when bike slips, then you have to stop and readjust pads.Maybe making pads so they are adjustable by screws thru pads into pipe legs? That's the only problem I can think of.
I have lost count of how many of similar Pedal systems I've purchased over the years. None of them lasted more than six months.....several failed within a couple of months. The Stamina is very strong and solid and nicely designed. I expect many years of use with it.