Trust me, they are as bad as 4frnt build quality used to be.
I have used them moderately for just under a season, and there is no topsheet edge left. My skis now go topsheet, exposed fibre glass, then sidewall. The topsheet really is not durable at all, and a lot less so than all the other sidewall construction skis I've ridden.
Also, the base material seem to be very thin. I have a cracked edge, and the P-Tex around it seems to have just been worn away, exposing the core.
They were good while they lasted' a nice, light ski. But they quickly started to fall apart after a couple of months.