This is my third pair of Mighty Walks. Im in the transportation field and am on my feet, shifting my weight all day. I followed the suggestions for the first pair (to wear them a bit at a time to get used to my body's realignment) and I could believe the difference. I can tell when I'm needing a new pair because my knees and one hip begin to feel it. The shoes, just like any, doesn't last forever. But I pop on a new pair and the pain is gone. I walk faster and lighter. They feel amazing and I won't enjoy my day without them.