I've had my korkers since last Feb or March and they are falling apart. I have put them through the ringer though! I love them still and have never had an issue with the interchangeable soles other than walking through deep mud or sand. Almost lost a sole this year due to some very deep sinky sand. I'll probably get another pair when this pair can't go any further. I like the interchangeable soles because felt is great for wading but when I'm rowing it provides no grip on the bottom of my boat. When I row I just throw on the rubber soles and I'm good. One day I'll get around to getting a foot brace and felt will be fine in the boat.