I had a pair of these that I wore for two years and they held up amazingly well.  I worked at a paper mill on the coast of Washington state and the only part that started to fail on them was the tread.  It started to come apart at the black knobby part on the edges in one or two places on the bottom, nothing a little shoe goo wouldn't fix I'm sure.  Also ran through both pair of places due to snapping, no big deal though.  My biggest issue is that these are not really waterproof due to the fact that if water gets to the part where the mesh is you will get wet feet, not soaked mind you. I had a pair of Timberland Hyperions in the past that were amazingly waterproof though.  All in all considering I beat these boots up during 12 hour shifts averaging 60-72 hours a week operating heavy equipment in harsh terrain they held up fairly well and were very comfortable.