I backpack in the Frank Church Wilderness/Idaho Rockies, carrying between 45 and 50 pounds, and am hard on boots so have tried several.  These fit so well I was sure I'd found the best choice but was frustrated later.

Good points:  fit perfect to size, immediately comfortable, soles grippy on rocky terrain and stable on the trail with a pack, did not rub my heals, or jam toes going downhill, comfy at the break and the cuff.  I have a finicky ankle bone nerve and these did not irritate it at all.  (LaSportiva boots gave that to me)  Better feel than Merrells were and Asolo; as comfortable as my favorite Lowas.  The sole wore a little on the very edges, but all my boots do, sidehill just does that.

Bad points:  goretex failed in the first season, in one boot when I got caught in snow for a few days (on top of the foot near the lowest lacing) then in the other boot during a section in rough side-hill (on the sides).  So I figured I'd use them for work at the cabin, but the seams on the sides of the ball of my feet began to let small grit into the layers of the boot and create thick wear spots on my foot. I shook and beat and pounded to make them wearable each time but eventually gave up.  That was the worst and hardest to ignore, it made my feet hurt within a couple hours.