Sadly, mine broke after 800-900 rounds. The firing pin is barely hitting the edge of the case and seems to be a very....sharp....strike.
I sent it off to Umarex after a very helpful lady at Customer Service sent me a UPS label via email.
Worse part was that I got to sit at the range, while I cleaned my .22 to ensure being dirty was not a contributing factor, and watch my friend shoot his new Sig 522 endlessly...oh, the shame!!!