Really nice keyboard!
Unfortunately, like others have said, the soldering job is pretty shoddy. I would never have noticed but the "R" key mysteriously repeats randomly when depressed. So instead of a single "R" I get "RR" and end up sounding like a pirate.
I'm going to try resoldering that switch to see if that solves the problem.
I did pull the board and took some photos. There are solder flakes all over that could lead to shorts or other reliability issues. If I wanted a poor soldering job I would have bought a kit and done it myself ;)