Just got mine in.
Verdict: Pretty damn good.
Threads are nice and smooth, the main logo has a nice feel to it, the adjustable pins work as advertised, and it hits pretty well even with the brass pins.
The only negative I can really give this is that the back etching isn't as deep as the main logo. For the fake serial number, I don't really mind, but I'd rather not lose the Hangul text over time.
In 18350 mode, this thing is really nice and compact. This is my first pinky switch mod, and the form factor is extremely comfortable. I shortened the throw on the bottom switch and am having no problems with misfires or autofiring.
In 18650 mode with my Panasonic CGR18650's, it is indeed autofiring due to the lack of insulation on the negative end of the battery. I'll have to grab some shrink wrap or maybe just try using electrical tape to cover the end to prevent this, but I was aware this could be a problem going in.
All in all, for $27 bucks, this was a nice buy for a beater mod. I won't be using it much besides at home with the Trident and when I'm out drinking with the Russian 91% once my Reo comes in, but all in all I'm happy with the purchase.