Scarpa Men's Kailash GTX

I have used these boots for a whole week straight in very rough, root-choked terrain, dirt roads and swamps in Rhode Island's Camp Yawgoog. These boots have treads like Alligator teeth to the point where I could stand sideways on a wet, mossy rock without slipping. The reinforced toe is very strong and while not a steel toe, gives you some peace of mind. The laces are the best I've seen come on a boot, but will probably replace them with some 550 Cord anyways. Some other reviewers of this boot said it felt like wearing sneaker, and while this boot is certainly light, you definitely feel that you are wearing a boot, especially when running. However, it probably didn't help that my field testing was my break-in period. Lacing is very secure (especially if you tie your boots Mountaineering style), however, at certain points, the boot was too constricting. This was my fault most of the time, but it was hard to find a happy medium between too tight and too loose. The boots are absolutely waterproof and while people say "Goretex doesn't breath", paired with the right socks (Darn Tough Vermont USMC Issue), the boot isn't overly sweltering, even in Summer heat. While NO structural or catastrophic failures occurred, aesthetic durability was a little bit lower than my expectations. The imaging on the insole and Made in Romania writing rubbed off due to friction and the tan "mooshy" material above the Vibram outsole and right below the greenish area (Pepper and Stone model) is partially abraded. This material is very soft and seems to be there for comfort, I feel this problem could be averted if Scarpa put a Cordura covering over the area similar to the Cordura Hydration Tube Covers for Reservoirs/Bladders on the market and on Source Bladders. Sizing was a little difficult in these boots for me, I am a 9.5-10 yet needed a 10.5 in these boots. I will be replacing the insole with a hard Superfeet one instead of the soft Scarpa one it comes with for more support with less comfort. I'll write a separate review on wash-ability when I see if I can restore the original Sand/Tan color from the current light brown that I got from walking in swamps and getting muddy. I guess my boots have character. I would not have any other boots willingly on the high-ropes, climbing, rappelling and zip-lining "Challenge" course I completed while there (except maybe Corcoran "Jump Boots" for landing shock). While not what they are meant for, they performed superbly. All in all these boots are PHENOMENAL! and worth every penny. As an added factor of cool and as someone already said, apparently these boots are being used by some members of the 75th Ranger Regiment (The U.S. Army's Rapid-Reaction, Special Operations Light Infantry Raid Force) in Afghanistan.
P.S. I'll post a review of how they perform in an upcoming Mountain Hike too.

I'm wearing the Kailash GTX Mid on my left and the Lowa Renegade GTX Mid on the right, and trying to figure out which pair to keep.
For those worried about sizing, I'm normally a 10-10.5, and the 45.5 fits me perfectly. The 46 is way too large. My forefoot is probably normal width and the Kailash fits perfectly. The Lowa is wider outside, but feels about the same inside.
The Lowa feels sturdier because the footbed is wider. The Scarpa is definitely a narrower boot, but both fit me perfectly. The Lowa also feels a bit more secure around the ankle, but both aren't going to provide real support. As an example, with both laced up tightly, the Kailash easily allows a finger in the side (1st inch) whereas the Renegade requires a bit more push.
The soles both have their pluses and minuses. The Renegade has great rear-heel traction and even has a slight curve with ridges over the heel -- it looks hard to lose grip with a heel slide. The Kailash has a much more rugged sole, but the the last inch is smooth.
From all of the reviews, people seem to like the Kailash's durability, but seems a common complaint for the Renegade.
I'll wear them a few more days indoors before deciding.
Update from Italy:
I just got back from a week of hiking in the Dolomite's, and these boots were marvelous. Hiked in the rain, up and down scree, and traversed via ferratas. I had the orange super feet in them. The scree and rock was a bit hard on my feet, but I attribute that mainly to my feet being a little soft.
The soles gripped the rock really well, even when slightly wet, though they slipped a bit when really wet (normal, I would guess.)
My only complaint is the size that fits me best lengthwise is a tiny bit too wide.

I took these for a 1 month hike in the Appalachian, and the first thing i noticed is the high treads make it easy to climb over downed trees in high inclines, the also allow you to really get good grip in almost every condition you may face. They are very waterproof to the point were I was intentionally walking in puddles and just watching as the water just ran off. They have great shock absorption, which is great on long hikes a bad boot can ruin a trip but these can make and backpacking trip a dream. the only downside to them is if you come across large size pebbles around 1-2", that are loosely thrown about you may have a bit of a stumble but otherwise these are the best boots I've ever owned, I would recommend them to anyone looking for the ultimate comfort.

Great fit out of the box. I have a slightly narrow foot and enjoy some additional room in the toe box. Stand-in-water waterproof and stylish for the trail. Quality, durable double stitched seam construction. One small downside is the flimsy insole these come with- I had to upgrade to a pair of green superfeet with a more supportive heel cup and to better support my arches. No shoe or boot manufacturer provides quality inserts, so it is imprtant to consider them regardless, so I cannot dock the boot any stars as a result. For the price and with back country's bullet proof return policy I would recommend buying these Scarpa Kailash GTX boots. I'm considering buying a second pair while their sale is on.

These boots have had a tough 6 months. I used them in deep snow, long hikes and very wet caves. They kept my feet very dry, even when I stepped in a 6" deep pool when caving. I though I'd spend the rest of the time with a soggy foot, but my socks were nice and dry. Paired with some thick wool socks these boots kept my feet nice and warm during some deep snow mountain climbing. The only complaint I have, and it goes for most so called breathable waterproof clothing is that they don't really breathe well. On hikes in the 70's my feet tended to get fairly hot, I'll look for something else to use this summer for sure.