Not sure who all might benefit from this but I figured I'd share my experience with 40-50 days in mine.
I've skied them with the liners that they came with throughout the time. Initially when I skied the boots I was horrified by how upright they were and how hard it was to get forward and over my skis even with the top buckles moved over and clamped way down. Ultimately I bought some spoilers from Dodge ski boots ($25, https://dodgeskiboots.com/shop/spoilers/) and used some Velcro tape to put those on the back of my liners and it fixed nearly everything. I had figured I might want to remove the spoilers for the uphill and put them back on for down, but they make such little difference touring I just leave them on all the time.
Prior to that I'd tried heel lifts but found that the way the boot heel cup of the shell is shaped it caused horrible pain on the lateral and medial side of my heel bone.
I'm pretty pleased with their flex and driveability, though as others have mentioned their flex is pretty progressive until you hit the far end at which point it abruptly stops flexing, which isn't a big deal and seems fairly common. I know these boots are rated 130 flex but they ski slightly softer than my alpine World Cup 120s.
Pretty much everyone I've encountered skiing these boots has felt like they're much too upright and is usually very interested in my spoiler solution.
I'm disappointed with how finnicky the walk mode is. It definitely feels strong but the precision of the movement that's required has been problematic. I've had a number of times boot packing where enough snow gets between the upper and lower metal blocks that even when the lever gets lowered the boot won't snap back into ski mode. I solved this by adding a $3 Oxo nylon kitchen brush to my kit, but it really seems like something I shouldn't have to do with a boot like this.
Then, even more frustratingly, on a recent hut trip in BC it got really cold (like -20 F) and the whole mechanism would freeze up in walk mode leading to lots of super fun banging and slamming on the little metal block that wouldn't move back down. Twice the mechanism only partially locked back into ski mode so it would feel nice and locked when standing and transitioning, but then when I went to ski and put some oomph onto the mechanism it would pop back open. It sucked the couple times it happened -- once the upper buckles even managed to get out from under the upper cuff wrap; thought it'd strangle my foot until I could stop and get it fixed. I've now coated all the mechanical bits back in the walk mechanism with PTFE lubricant in hopes of fixing this, but don't really know what else to do (also probably won't get cold enough here again to test thoroughly this year).
Then there are the stupid durability things that have happened: one of the pull loops on the back of a liner ripped away from the harder plastic backing on the back of the liner. I used some heavy duty thread (35 lb test) and sewed the loop back onto the liner, then did the same through the hard plastic but it feels like it's only a matter of time till it fails. Then on the other boot the power strap tore around the secondary screw that holds the power strap in place while I was pulling my boots on (not the burlier midline screw in the back but the one about 3" away from that).
Overall they're strong solid boots that ski well but I've been a bit frustrated by how unrefined they are.
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