I bought a pair of these boots with the idea in mind that I wanted to get a pair of hiking boots that would last me a lifetime and perform well under some serious trekking conditions. I was disappointed; I do not recommend these boots and disagree with the review by Peter below. The first real test of these boots was a three week trip trekking in the Annapurna region in Nepal. I had three major issues with these boots. The biggest issue was that of waterproofing. I had treated and proofed these boots with recommended Nixwax leather cream a few times prior to the trip and within a week of wear the leather was sopping up water. The leather literally absorbed the water and made these boots incredible heavy. They already are very very heavy boots, which is something you should really consider if you are doing long hikes. The second issue I had was the stiff leather and flex of the boot with the step; the toe box is really big (which is actually nice, esp with descents) but the transition from the tow box to the foot uppers creates this collapse of the uppers downward (if that makes sense, you can kinda see it on one of the photos below). This results in an awkward fit around the bulk of your foot. Thus, these boots did not have a great fit, they were not snug and not consistent b/c of this toe box issue: I had to really tighten the hell out of the laces to get snug around my foot erstwhile my toes were super roomy. This is awkward. My last issue was something that I noted below in one of the photos: there is this transition point between the formed heel cup and the soft uppers that creates this ridge that is right on the apex of your calcaneus (heel) bone that caused serious serious blisters for me. Everyone's feet are different, so not everyone will have this issue. The construction issue, though, remains, the leather in the heel cup is really stiff and this ridge causes some serious issues and was incredible annoying throughout my 3 week hike, even with the callouses that I'd developed from wearing these boots previously. I was able to stay on top of my blisters but taping religiously (but the lack of waterproofing didn't help as my feet were always wet). I am disappointed with these boots on all fronts; they are very expensive and, although they are constructed well (clearly Zamby knows what they are doing) they did not perform well for me on my trek. After this trek, I am going to get rid of these boots and buy a pair of Gore-tex lightweight synthetic boots that have a better flex and that are not leather. There is something 'classic' that draws people to leather, some sort of aesthetic, or prior experience with leather boots that becomes romanticized (it is certainly why I bought these). But when it comes to getting up in the mountains where you expect your boots to do their job and to not become a burden, these boots fail on all accounts. I would recommend these boots to someone who works in the woods or construction or farming or something where you need to protect your feet, but NEVER to someone who is interested in hiking/trekking; there are just so many other better boots out there that are lighter, deal with moister better, flex better, and provide better foot support than these. These leather boots are not worth it.
Bottom line: These are not hiking/trekking boots. They have zero 'performance' characteristics. Not waterproofable when compared to what a good Gore-tex boots gives you, the leather absorbs water. Funny flex and awkward transitions in the leather at heel cup and toe box.