After a lot of years of long distance running in cushioned shoes plus orthotics I begin having problems. Feet were hurting, lower back was painful, cramping in the calf that would not go away. My doctor suggested "Muscle Activation Therapy". After one session my back pain was mostly gone. This was after over ten years of pain. In my discussions with the trainer he suggested that problems I have been having including the back pain could very well stem from my running shoes. He is not a fan of orthotics (never mind that the price for custom made one is a total rip-off) - they don't allow the foot to do what it was designed for. He suggested barefoot running shoes. Lots of interesting information on the web with regard to this type of shoe. I went to a running store the specialized in barefoot running. I bought a "transition" shoe and was told just to walk in them - a very slow break-in period. (I am not running until the trainer takes care of the calf problem). I started walking a quarter mile and am now up to over one mile. I won't go into all the benefits since they can be found on the web. Let's just say I feel very good walking. The complete transition to these shoes could take several months. Anyone have these types of shoes? If so what are your opinions?