I got this sandal to do some light hiking as well as use around water. It was immediately comfortable from day 1. no breakin period. size is true to stated sizes.  I'm not familiar with other styles of Keenes. This one doesn't have a significant arch support for those who pronates or needs added support. Nonetheless, its very comfortable, no odor after spending hours in them. I didn't develop any blisters! If you plan to use socks with sandals, consider upsizing by 1/2 size.