It's not so much anecdotal as it is inferential. It is perfectly reasonable to presume that if someone cannot do X then they cannot do X' as well.
The general consensus from those, myself included, that have experienced Chinese cutting tackle that this sort of gear created, as in designed and implemented, in China is not even close, in all regards except perhaps price, to the same gear made elsewhere.
That being the case it's not fallacious to assume that their printers, which exhibit all of the characteristics of a plotter with the added complexity of squirting ink in lieu of merely dropping a blade on the media are no better designed or constructed.
Pot metal fasteners, holes that don't come close to lining up, incomprehensible but often entertaining manuals, equally incomprehensible control panel sequences, non-existent technical support, repeatability that's a joke, seemingly endless parts replacement if you're sufficiently fortunate to be able to actually get parts, and generally mediocre, at best, performance. If you have an obscure brand Chinese machine and think it performs well I would give good odds that you've never wrangled a brand name machine.
What Bob said...
The Chinese can't even design & built a decent plotter.... logic dictates that their efforts at producing more complicated printing machinery aren't going to be ANY better.
Let me just clarify; the Chinese plotters I chucked out were NOT ancient... they were manufactured last year (2010).
The ancient machines I was referring to are the REPLACEMENT machines.... a pair of 25 year old plotters with a bazillion miles on the clock... better design, better components, better build quality... MILES better performance & accuracy.