I am a crossfitter and was looking to replace my Nike running shoes for a zero incline shoe. I've had these shoes for about two months and use them 5-6 times a week.  No break-in time needed (except for longer runs).  I wear them barefoot and ordered the size I normally wear.  They are just starting smell. My toenails have just recently started to feel bruised,  but I would much rather deal with that for a lightweight shoe that seems to just mold into my body.