Well, my local shop got an order of the new Arc'x Bora2 boots in (the ones with the removable liners) and I was eager to get a pair. That was until I tried them on. The fit was not what I was expecting and I'm not nearly as excited about them anymore. The floating gore tex liner was a bit loose and sagged in the toe area of one of the boots, creating what felt like a bunched up sock above my toenails. If anyone has ever lost toenails due to a slight rub against the nail over the course of tens of thousands of steps, you can appreciate how worrisome this is. The boots felt sort of long and narrow, and my normal shoe size (11.5 US) felt too big. I dropped down to an 11 and that improved matters in the toe area a little.
The liner is pretty thin and I wonder how many pressure points there will be from the shell of the boot. Because the shell and liner are separate pieces, the shell folds and bulges in odd ways around the lace area when you flex your foot, inviting trail debris into the space between the shell and liner. Maybe this is just an issue because the boot is new and the material not broken in. I was excited about the removeable liner (which does come out easily and has a sole on it, so it could serve as a camp slipper) but now I wonder if this might be a liability. The padding across the tongue and in the ankle is also pretty anemic. It just screams 'hot spots' later on if you get into challenging terrain and snug the laces down.
They might work okay in the long run, but my first impressions are not positive.