Never had or shot one of those. I have a stainless Sterling Arms model 302 semi-auto 22LR. I've only taken it to the range once so far. Shot a couple of hundred rounds of 5 or 6 different brands/types/weights of ammo. It ate everything - solids, HPs, bare lead, copper washed, brass plated.
From what I have read their guns vary a lot from great (like my little 22) to horrible.
For 200 bucks, I might take a chance on it. I've got a couple hundred rounds of 380 around here, and no gun to shoot it in. It's not like I'd be using it to hold off the walking dead, and if I ever got to that point, it would be better than teeth and fingernails I suppose. If it worked...GREAT...If not, big deal. I spent that much on a "Color-C-Lector" and a "PH Meter" for my bass boat back in the day. It couldn't be any more of a paperweight than those two gizmo's were.