I gave it 4 stars because the back part rubs my heel a little, but only on my most recent pair. You can actually fold it down and solve the problem though. Surprisingly itll stay like that running. Its also one of those things thatll fix itself when I break them in. (I don't wear socks, so it might be fine if you do). Ive been running in Five Fingers for 10 years now. I run a half marathon every Tuesday, Thursday, and Saturday. I cant imagine doing it in standard running shoes. This particular style holds up well and feels good. Once I break them in I feel like Im running in socks on AstroTurf.