These are my first real mountaineering boots so I don't have much to compare them to other than my multiple non-mountaineering backpacking boots (a variety of Asolo, Danner, and Vasque models). I've only had a chance to use them with crampons one time so far (Grivel Air Tech Light) which worked fine as expected, but I have used them several times while winter backpacking in my MSR Lightning Ascent 25 snowshoes. I was extremely surprised and happy at how comfortable they were while snowshoeing in them. I expected I would sacrifice significant comfort in exchange for support, warmth and dryness by wearing them, but I did not. They kept my feet warm and dry and have not created any hot spots or blisters when I have gone snowshoeing in them. The coldest temps I've used these in were in the low teens Fahrenheit and my toes were still warm and comfy. I have a habit of wearing thin merino wool liner socks under my thick merino wool mountaineering socks which may be why I have not had trouble with cold toes when others state that they have had issues at similar temps in these boots. My only "issue" with these boots is that they are definitely smaller than my other boots for a given size. I typically wear a size 11 1/2 or 12 in my backpacking boots. I had to size up to a 13 in these to make them fit the same as my other boots. It's not a problem as long as you know about it, so be aware of this quirk in sizing with these.