I received one for Christmas last year that I SBR'd this spring. U.S. machine gun sells a rear trunion that doesn't require your to drill and tap the receiver if you do want to go the SBR route. They also make aluminum quad rail for it, but the polymer one is very sufficient.
Runs great, built like a tank (milled receiver is super solid). Accuracy is sub 2 moa with just about any ammo I throw in it. Its a lot tighter than most AK's I've played with, virtually no rattle. Mine came with the "shark fin" front sight, I'm up in the air if I like it or the standard Ak front sight better. If you get one, a little bit of white paint on the front sight makes a huge difference. Comes with a tapco trigger that was surprisingly light with good reset.
As a pistol it was pretty hard to use, I added a PWS break and it helped with muzzle flip but was still a little hard to control for double taps and rapid fire. As an SBR its just plain fun.