I've been doing a lot of direct from China buying myself lately. Head to head, I haven't found the quality to be all that good, but when you consider the low, low prices, it is certainly adequate, and probably a better deal in most instances, although I don't think I would buy life support equipment from them.
I've been happy with the PP60 so far, I'd have to say that even though the quality is noticeably Chinese, it seems to be a step above the stuff I've gotten from Harbor Freight.
Penncrest Buzzbox - Infinite amp control! Man the 70's were good.
Everlast Powerplasma 60 - Reliable unit, cuts well.
Everlast i-MIG 250P w/spoolgun - Really smooth, plenty of cajones.
Everlast 250EXT - Worse than a Harbor Freight welder.