Century is a quick and dirty sort of company, so they had a higher incidence of problems with a lot of their cetme's.
But they are NOT universal crap. I know lots of guys whose cetme's are in spec and work fine, including my own, and didn't require tons of fussing to get them that way.
So if you want one, do a bit of research, there's only a few things to check before you buy, and lots of correct information out there on the web to learn what to check. Steer clear of out of spec rifles, unless you like the project of correcting the problems - some guys do. From what I've seen on the web, about 60-75% are fine - quality control was horrible to get the numbers that low, but you still have a pretty good chance to find a decent one.