It has all new tooling and molding and newly fabricated back plate IE no misalignment on the keys not a blemish to be seen in the body feels very sturdy nothing like the old reviews that's why I was on the freaking fence so long I was afraid of the quality issues but this one seems perfect.
This was worth it but this is my first MK (i know its technically a membrane ) and also my first Unicomp but the new equipment really shines here
I own no Unicomps myself, but I imagine that a lot of the QC complaints were from some very picky IBM purists. I imagine it can be hard going from an early IBM 1390131 to even an early Lexmark. As time went on, materials were made thinner, legends less sharp, etc.
To go with the "IBM purist" thing, an early IBM 1390131 is the kind of keyboard you beat DOOM's cyberdemon to gory death with. Later Lexmarks and Unicomps in general aren't as tough, so you'd use those to beat to death, at most, the cacodemons and the mancubuses (mancubii?). But the point remains: they're still somewhat tough keyboards.
However, Unicomp seriously dropped(*) the ball for several years regarding keycaps, where the dyesubbing became noticeably worse and increasingly-poorly aligned, to the point that some early Unicomp keyboards were scavenged for their caps (I wish I were joking). This, and some other rather visible QA issues were what gave a bad name to Unicomp's keyboards.
I really, really wish they have gotten better. For better or worse, I'm in line for one of those new SSKs, when they do come out. We shall see...
(*) As opposed to "marketing skills", where Unicomp never HAD a ball in the first place.