I stand most of the day, working retail and these shoes have save my legs and back from pain. Before I had these shoes, I would get in my car at the end of the day and cry! No More Pain! The only side effect that I have seen from wearing these shoes is that I have 'grown' a hind end. My rear view mirror has always been flat as a table top, but now, I have a round, well muscled, uplifted cushion that I can sit on comfortably. I also had a very serious fall, on a gasoline-rainslicked service station driveway, while I was pumping gas and if I had not had my newly acquired rear cushion, I'm absolutely positive that I would have broken my hip. Thank you Cra-Z-Coil....