IMO, the Chinese bikes didn't really get better quality-wise overall until 2009-2010...
I have one... a 2007 model if I'm not mistaken. bought it as one of those buy online / drop ship deals here in the U.S. I wasn't expecting much, but have been pleasantly surprised. After a little research, I found that there were some beginnings of improvement even then, depending on which factory they were made in.
Over all... the basic mechanics have been good, the secondary stuff a little less so. Needed to put on new mirrors, (plastic ball joint failed), fasteners for the tupperware were crap... replaced with new bolts, stuff like that.
If you buy a Chinese scooter:
1... do a complete "dealer prep" service (details can be found online)
2... replace all fluids (part of the prep)
3... tighten and use thread lock on all nuts, bolts and screws (part of the prep) ESPECIALLY ON EXHAUST (notorious problem)
4... replace crap spark plug with a good one, (although mine shipped with a good one as original)
5... IF you buy a carburetor model (fuel injected would be much better), replace the auto choke (notorious problem).
6... do a valve adjustment (easier than it sounds with basic mechanical aptitude)
7... expect to replace the crap battery pretty soon, but use it until it dies.
My scoot, (was for my daughter at school / never really got comfortable with it), sits for months on end... sometimes many months... and starts right up each time.
If I could stuff it into my suitcase, I'd bring it down to Punta Cana with me and leave it at the condo. LOL