I have only used these twice so far, but am very impressed with the range of motion, weight (29's were 859g), snug but comfortable fit, and stiffness. My feet are 285mm long, 109mm wide at the forefoot and heel is about 68mm. I have a lot of trouble getting my heel snug in hiking boots, running shoes, and nordic boots, but these are pretty good right out of the box. I'll probably add some inserts to snug the heel up a up a bit, but I'm not even sure if it's necessary. If you have a wider forefoot than me, you'll likely have to do some modifications to the shell. Doing the shell fit I'm just about touching either side of the boot without the liner in. I have a fairly low volume foot and usually need to run two insoles in my ski boots to fill up the vertical space, but these fit really well.
I was mostly impressed with how stiff and responsive these were on the icecoast moguls we skiied last weekend at the Jay Peak rando race. I felt that they skiied as well, if not better, than my black diamond primes on the hardpack, and WAY better than the only other touring boot I've used - the scarpa flash.
The walk to ski mode switch is super easy. No straining to close the buckle at all. Pretty amazing compared to the beefier alpine and touring boots I've used where I need serious leverage to get a snug ankle fit.
I'm somewhat skeptical about the durability of these, given the plastic buckle, and plastic latches for the string that secures your ankle, but only time will tell on that. The skepticism may prove unwarranted - fingers crossed. I think the forefoot boa closure scarpa is using is probably the best design - I love the boas on my cycling shoes - but this ankle strap works well to secure the foot in place.
I'll add details as I ski them more!
Wanted to update this since I promised I'd do so above after some use. I've now used them in a variety of race and touring situations, and remounted my heavier skis so I could use them all the time. I have at least 160k of vert on them now, as well as some ice climbing, and plenty of rock/off-snow travel. I don't have the red snow guards or power straps on, and haven't felt the need. The soles are holding up well, and the plastic shells are less banged up than I would have thought for so much off snow abuse. The ankle articulation is incredible - virtually zero resistance. The rear latch mechanism was susceptible to having the spring pop out. It happened once while post holing, and another time while bootpacking I hit the lever with the toe of my other boot. The spring popped out in both cases. Over the summer I was devising ways to come up with a way to block it, but fortunately La Sportiva did it already - literally the exact I idea I had! It should prevent this from happening, and up to this point that was the only notable drawback. Jason shipped me a pair for free and I just switched them out. Hopefully that takes care of the issue.
One minor downside to the ski/walk mechanism is that the rear latch can interfere with some automatic crampons. The smaller the crampon lever (like the light camp ones) the better.
Mine fit well out of the box with some liner molding, but I've heard from folks that boot fitters have been able to easily modify/widen these boots. From what I understand that's a concern with many lightweight boots, but apparently these have been easy to work with.
bmac, just received a pair for my wife and for the first time in my life I read the manual....
It seems to solve your crampon issue if you want to go with steel ones:
2. ADJUSTING THE LOCKING SYSTEM
In the case of use of crampons, you will need to adjust the rear boot lock[E] so that it does not interfere with the crampon during walking. Then regulate the adjustment screw on the locking lever[F], thus varying the inclination of the locking system.
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