I had one and sold it. It wasn't a bad gun, fun to shoot. Big flame when shooting, accurate, light weight, cheaper than an AR, more pistol like than AR pistols.
But quality was also cheaper than the AR. Lots of plastic, the barrel didn't seem like it was high quality. It didn't like metal cased ammo at all, of course some AR's dont like it either. All in all a descent pistol, but could be better quality.