first impression of this boot is how light it is. feels like a day hiker, yet burly enough for crampons.
so far have only taken it on shorter hikes (less than 5 miles) in new england snow. i have been in these boots with little break in, pretty much laced them up and out the door for some shorter hikes. heel cup felt a little weird at first, a little tight, but got use to it quick and best of all no blisters.
they are definitely stiff enough for crampon work, but wouldn't necessary try any vertical ice with them. however they are light enough that i will use them a daily hiker in the summer when my pack loads are up and trail runners wont cut it.
size was right on, and they have a multi layered footbed, which allows for expedition style socks as well as thinner socks for summer use.
took these boots on a 5 day sierra bender and will no longer be wearing them. the heel design has made for a very uncomfortable pressure point on the back of the achilles, to the point of thinking I had strained it. wanted to love them, but unfortunately too much pain. blister free yes, pain free no.