I really like this shoe. I didn't experience any break-in period. Very comfortable and lightweight. At first I was worried that there wouldn't be enough support, as the insert doesn't seem to have much of an arch, but this hasn't been a problem. I did buy the men's version of the shoe as my size was not available in the women's version. Great shoe and I would definitely recommend it. The women to men conversion in my case was a women's size 8 to a men's size 7.