I had knee surgery on my right knee 5 months ago and my left knee a year and a half ago. Since then, I've really struggled with stability and with knee pain. We just moved into a new house a month ago and I've really been struggling because the stairs are 8" instead of a standard 6. I just received this today and already noticed a HUGE difference in what I'm able to do. The pain just traversing the stairs is almost gone, let alone all other abilities. It was easier just getting up off the floor, and kneeling or squatting. In addition, I generally have an allergic reaction to most braces or support devices. Not even sweat bumps with this one!