I just got my second set of GTX Summits from EMS. My first pair were very good to me, they must have 1000 miles on them, 300+ of which are mountain miles. The Gortex shell wore out on them, after about 1 1/2 years of abuse. I also had my buddy heat them up for me over a stove once, which didnt help im sure. I think I can get the new boots to last even longer. In my opinion, you cant beat a good pair of italian leather boots. Im sure others will disagree.