Toby S.wrote a review of Black Diamond Prime Alpine Touring Boot - Men's on February 11, 2013
Familiarity: I've put it through the wringer
these things didnt last a season of touring. cracked both bootboards under the arch, 2 wire buckles failed, soles are torn up from walking on rock, super roomy/unresponsive (i have a pretty normal foot), pebax shell has some serious gouges/ is just plain beat up, flex is sloppy non-progressive and harsh at the end, locked open buckles will shred your pants, boa liners blow, and the shell around the canting pivot has ovaled.
so if you are still considering these boots then read on: amazing tour mode, light, roomy (if you have giant feet), warm (but just do yourself a favor and get intuition liners), cheap (you get what you pay for), good traction, and i would be stretching to find another pro.
unless you have high volume feet just dont even bother