Great fit, but be aware that there may be a breaking in period. I have average feet, not too wide, etc. These were VERY snug and uncomfortable for the first few days, to the point that the straps left deep indentations. I thought about returning them immediately, but my wife encouraged me to see if they adjusted after some wear. They do, and now they fit like a glove with no discomfort or indentations.

The bottle opener is a gimmick, and not a selling point for me. Why would you put your dirty footwear anywhere near the mouth of your beverage? Who knows what you may have stepped in recently, even on a sandy beach? Bleh.