I think the Yugos are more accurate than the Chinese. They're also built like tanks, but that's the problem with them. The Chinese SKS's make nice light little carbines. The Yugo's are heavy and cumbersome in comparison, but they're also cool from a collectors standpoint in that they have all kinds of stuff on them. They have the fold out bayonet, grenade launcher, gas cutoff, grenade launcher sights and flip up night sights.
As far as the workmanship goes I'd rate them better than the Chinese or Romanian but not as nice as the Russian. Yugo rifles in general do not have chrome lined barrels either. Apparently Yugoslavia had a shortage of chromium.
I don't think I've ever run across a Yugoslavian rifle in decent condition that I would consider junk. The Yugos didn't build their weapons as well as the Swiss or the Finns, but by communist standards they did a pretty good job.