The Reebok commercials are quite convincing about the benefits of these shoes and I had to try them for myself being an athlete junkie that I am. I found immediate comfort when I put these on my feet and can really feel the action of the stability balls on my muscles. This was especially evident after running 7 miles in an hour in another pair of shoes and then wearing these the next day. I can feel it working those muscles which are already tired-so I can feel it working. I also love the style too, I got the black w/khaki accents and I receive tons of compliments from both men and women alike. I'm going to buy another pair in a different color wave to go with more clothing.