In my experience, their early designs (.32, .380, 9mm, & 40 cal handguns) were cost effective & relatively trouble-free. I also had no problems with a .40S&W Sub2000 (gen1) & a PLR-16 (pistol version of their SU-16). Based on what I've read, some of their newer stuff (rimfires in particular) might be less reliable, so obviously YMMV - which I believe is also true for any individual firearm from any manufacturer. Having sold most of my guns a while back, I don't have 'a dog in the race' & won't react with outrage if anyone expresses a different opinion (although I reserve the right to laugh at any replies ;>)...
I have a P11, PF9, Sub2k in 9mm....many rounds through them...never had a problem.