If it's on the boot wall when I'm getting new boots - I'll be sure to put it on my feet - my guess is it's too wide - I swim in anything but the narrow side of a 98mm
It might be too wide, but I think there is more to it. I have a B width foot with no anomalies and it feels to me the same as the Salomon X-Max, although that boot is noted as being on the more generous side of of 98mm.
How it buckles and holds my foot is entirely different from the X-Max, however. The roof fit to shin fit is so perfect for me in the curvature of the tongue, and the buckling system and shell design may make “last” less of a singular variable than we are accustomed to.
What first really tickled my thinking was Salomon’s claim that they had used some of their mountain running shoe tongue design, and I happen to hike in Salomon mountain running shoes. I’ve never had a tongue and lace system that basically begged you to run down the mountain with no forward foot movement and so it struck me as more than marketing. That and the fixed tongue in the shell as I struggle with sideways liner tongue movement due to tibial bow.
The two lower buckles are connected in how they wrap the shell (again, similar to the shoes) and because it isn’t an overlap as you tighten the lower buckles you aren’t collapsing the shell - in a traditional overlap the plastic will start to distort, usually at the overlap contact, and that doesn’t happen here. For me, this works to “pull in the last” around my instep from the side without killing some roominess for the toes. I have some pics in the thread I linked in my post further up that show this, but you can see it here at the second buckle. I have no instep pressure at all - just “snug”.
Now completely contrary to this, I bought my wife the QST Pro 110W. She skis in the X-Max 110W and she was swimming in the QST, but her instep is lower and she has tiny ankles and lucky for me could be a foot model. So it was too roomy.
It’s weird, because the boot reviews are high insteps need more room, and that’s absolutely the correct first impression, but I think high insteps can work once the liner is broken in because the shell will snug around the instep without crushing it and the tongue is perfect.
I am also a one person population sample.