The Romanian versions often have a canted front sight and/or a canted gas bloc. The former is aggravating, the latter will cause premature wear. The major supplier of Romanian AK's has been Century Arms International (AKA CAI) who incidentally, also did at least some amount of the final assembly work which included a lot of their own USA-made parts, most of which were/are not up to spec. The fire control parts are particularly troublesome in that the trigger pull is among the worst of all AK's, and as-issued, exhibits an annoying trigger slap. You may also note that those annoyances are relatively easy to fix....but...is almost impossible to reassemble due to the infamous "shepherd's hook" multi-tasked, woven, spring-thingy they chose to use.
Still though, they are as reliable as any other AK, and if the front sight aint TOO badly canted, it's design does allow for quite a bit of adjustment.
The only China AK's that I've worked with were the older MAK-90's. As a group, they were excellent. The only negative I found was that some of their parts are different-enough from their European counterparts that they don't interchange and at the time, were hard to find. That may or may not be a problem today though.
That's all I know about that.
DGW