I have only worn these boots twice.  The longest backpack was short, about 3 miles with a 45 pound load, over dry rock trail.  They were comfortable from the first step.  I live in Texas and am going to Yellowstone.  I have backpacked for over 30 years.  I needed new boots for the upcoming trip but wanted something I might be able to use in wilder Texas hot hikes as well.  These looked like a good boot for both climates.  I saw the reviews about slipperiness on the soles and will watch for that.  They have Vibram soles which have always been the best, so I am doubtful there is an issue, but will be careful nonetheless.  Does anyone truly buy a long distance hiking boot expecting waterPROOF capabilities???  In all my years in WA, ID, AK, WY, AZ, NM and CO, maybe 12 pairs of boots, I have never found any to be waterproof, or even water resistant after slogging through tough snowy rainy mountain terrain.  Your best bet is a dry camp, plenty of dry socks, and a fire once in awhile to dry the wet ones.  I would not use these boots for cold weather snowy long hikes.  I will update this review if after my Yellowstone trip there is any issue.  Good hiking to all!