I bought one, got about 500 rounds through it so far, 0 failures so far with no cleanings. Ran CCI ar tactical .22, federal bulk, and Remington thunderbolts through it. Only downside I see is the lack of magazines available for purchase and the fact that it only comes with one.
O and I guess I should mention that my rear sight came loose after the first hundred rounds... the sights kind of suck anyways, I switched mine out for xs big dots so the sight practically falling out just made the install a little quicker
I bought one from my buddy and I have never had any problems. I use it as my Suppressor host. Works with CCI standard vel, and anything else I have tried in it CDNN has mags for $30.