Packaging looks similar/identical to a 104 set I got off of
geekkeys, only difference(other than cap count) being that the caps lock has an LED pass-through while mine do not.
From what little I've used of them(admittedly only mods; bought the set for a keyboard that hasn't been built yet) they seem fine. Not thick PBT but not all that thin, either. And quality-wise there weren't any issues, either.