I question the marketing hype about these shoes being an exercise tool. I did not experience that. I also found the insoles to be mediocre. but when I installed my own insoles these became the most comfortable shoes that I have ever had. It is like walking on a cloud. The sole cushions the steps. Going back to regular shoes feels relatively like walking barefoot on concrete. I can't wait for them to make more models so all my shoes will be Skechers.