FAIR BOOT WITH LIMITED APPLICATION
First warning: If you're looking at purchasing a "mountaineering boot", then I hope you have some experience in this genre of footwear and know what you're getting into. These are not wear out of the box shoes and take quite a bit of time to break in. I've been working in them for 6 months and have probably logged 40-50 miles and they are just now starting to get "comfortable".
Second Warning: These are NOT mountaineering boots...although modern crampon compatible and imbedded with a 3/4 nylon shank, the nylon fabric heel backing (which adds increased comfort when walking) limits the environments you can take this boot into. Additionally, the leather, until treated, is still water permiable. When treated, you lose the breathability of leather and your feet will heat up more quickly. The reality is these boots are simply heavy weight hiker/ backpackers with fantastic ankle support and limited environment application.
My assesment: These boots run narrow in my opinion (I have a pretty regular size 11-11.5/ 45EU foot with no arch dramas). I've tried a variety of replacement insoles and found that Superfeet take up far too much room and my foot felt incredibly cramped. Go with a very low pro insole and stick to lightweight hiker socks to get the best fit...these boots, after all, are not meant for winter weather. It will take time for your foot to get use to this heavy duty boot. Good overall traction across a variety of environments and I haven't had any of the problems previously listed with sole/ rubber separation. If La Spotivas are your flavor, this can be a good boot with LIMITED application. If you are looking for a heavy weight hiking/ backpacking boot with crampon capability and more water resistance, I would recommend looking into the Scarpa Barun GTX, Asolo (best for wider feet) or exploring some of the other La Sportiva models.