I have had my smart puck now for about 3 weeks. I am so happy to have one. No more loose sockets, no more friction sores, no more painful walking. It has changed my walking completely. I am 63 and live on a small horse farm with my wife. I am very active (have to be) and this system has really, really, helped me to be able to do the work around the place. It has also helped the chronic back pain. Not totally eliminated it, but I have had a substantial drop in it. I wish I could have had this smart puck back in 1987 when I lost my right leg bk.