I really liked these shoes. Unfortunately, the heel strap rubbed unpleasantly when putting it on. Within 20 minutes of walking (and a short sprint - they have a REALLY awesome springy energy return) my arches felt incredibly tight, my front feet were in a lot of pain, and my right sole was producing an uncomfortable squeaky vibration with every step. That being said, they look very cool in person and fit well overall. I suspect people with flatter feet than me, with forefoot emphasis and the like could handle it, but not so much for me. I sent them back within a day.