Just like Hyundai's!
which are about hte most reliable cars on the road.
Hyosung uses Suzuki motors. That GV650 uses the same motor as the Suzuki SV 650.
There is actually a pretty decent following for them on the web. Lots of information about their reliability and owner testimonies--good and bad. There is a pretty substantial relationship between Suzuki and Hyosung, but nobody will go out and say exactly what it is. From what I've gathered, Hyosung builds many of the parts for Suzuki, and might actually manufacture some of the motors--most notably the 650 cc vtwin.
Not saying they are good or bad, but just because they are Korean doesn't necessarily mean they are crap