"This is a great shoe for average work outs--if you're doing cardio on the elliptical, doing some weight training, spin class, walking. I don't think it has enough support for full on high impact classes like boot camp. Since I rarely do those classes, the shoe mostly works for me. I do have to say that my orthotics, which have always fit well in other Rykas, make my toes feel a little cramped in this shoe."