After seeing all of the positive reviews I purchased these as my old running shoes were at their deathbed. I find them to be really comfortable when running and would give them 5 stars if just for that. But...I like my eliptical machine and since there is no upper support my foot is forced forward in the shoe when I'm on it, sort of scrunching my toes up. I actually have a bruise under one of my toenails from this, and for that I give 3 stars.