As a lurker over at cnczone.com, I've seen this subject come up a number of times.
I did find this mention in a thread and it seems to be the same supplier.

JINAN QUICK CNC ROUTER CO., LTD.
LANXIANG MIDDLE ROAD, TIANQIAO INDUSTRY ZONE,
JINAN, SHANDONG, P.R. CHINA 250033
Contact: Taney
Mobile: +86 13665418909
SKYPE: taney0118
Email/MSN: [email protected]

The contact person here, Taney, has such a good reputation that when he changed companies, a lot of buyers and potential buyers, went with him.
I've no personal experience with the company but Taney seems to be one of the competent guys. See any threada by rocket67 on cnczone.com