Most of the reviews here are from people with balance problems, or rehabbing serious injuries.  I'm not in that category; I do have some joint problems, and have had some PT, but I'm working out again and I see this as a piece of equipment that serious athletes, or anyone,  can benefit from, not just patients.  I'm using it to work my foot, leg and core muscles, not so much for balance per se, although it certainly benefits that as well.