I have never owned a PTR, but the Century CETME I owned was less than impressive. Mostly, it ran really dirty and the cost of .308 ammo was a part of why it got sold. ANY blowback gun will be dirty and the flutes and chamber are a pain to clean with the G3 pattern of rifle. Also, headspacing roller-blowback is a bit unusual and Century did a craptastic job of making sure it was correct.
BUT, there is a lot to like about the roller-delayed blowback system. It shoots way softer than expected. The integrated rail on the PTR is a big plus over the CETME. I may need to consider one again based on the responses here.
Forgot about the flutes in the chamber. Don't plan on rescuing any brass from the PTR it chews up the case neck pretty good. I don't reload for 7.62X39 anyway but some people police their brass. Not having a bolt hold open is a minus for the PTR, but it takes AK mags and the charging handle is cool. The pic rail and HK sights are a plus too. They make a collapsible stock for the PTR which looks really good and keeps it over 29" overall.
Does the VZ58 have a bolt hold open? I know the AK does not.