I have two PA-63s - one was a new commercial model (that I bought used), and the other is a surplus import (I'm not sure if Century imported it, but if not, I suspect it is about the same). They both work okay. The surplus pistol has a very rough exterior on the slide (lots of machine marks - like they just skipped the final polishing and blued it). The commercial model has a nice finish, and the other surplus pistols I've seen are much nicer looking than mine, though the bluing is generally somewhat worn. The decocking lever on my commercial pistol was very difficult (really impossible) to use - it just wouldn't go down. Then one day I got to messing with it and got it working again (I'm not really sure what was wrong - maybe some grease or grit in the works or something). Other than that, they both work fine.
I think all PA-63s have VERY heavy double-action triggers. Mine are okay in single action (for this type of pistol). So obviously these aren't the finest pistols money can buy. But they are probably some of the finest pistols $100 can buy. They probably cost around $20-$30 less than a Bulgarian Makarov. I'd still pick the Makarov, but the PA 63s look cool, have a push-button magazine release, are a little lighter, and work pretty reliably. I'd pick a PA-63 over any of the really low-end (often zinc) pistols (Jennings, Lorcin, etc.). I think they are decent pistols and good values.
Doug