These were purchased early for an upcoming trip, it doesn't appear I needed the break in time, they are good right out of the box. Like other reviews have said if you are going to wear proper thick socks you should go up 1/2 a size. I broke my foot last fall and althought I wear good nursing shoes my foot has a tendency to give out on me sometimes, not on the days I wear these. twelve plus hours yesterday and no discomfort at all. They are light weight, more so than some of the Klogs I wear and I didn't have any issues with my feet getting too hot.

update 8/7/13 , wore them all around Alaska. Up and down mountains, hiked to Worthington glacier over loose rock, in and out of creeks, perched on wet rocks in Valdez -fishing. Not a single problem. They are not showing any wear other than being a bit dirty. I felt secure in my footing at all times. I am more than happy with this purchase. Besides the color is awesome !