These shoes have pretty much everything you could want in a running shoe. The socks are wide, the sole is well cushioned, they are impeccably light. However, there is a piece of hard plastic at the back of the shoe that constantly destroys the heel. I've had these shoes for a couple of months now, I've probably run 50-60 miles in them thinking they just needed a break in. Yes, these shoes chafe and chafe on my heels, even with thick high socks and bandages. Wouldn't recommend to anyone who appreciates flawless legs.