A friend of mine bought a Chinese copy and after a month or so, the CAN chip went, leaving it only suitable for older K line cars. Ok if you have a Mk4 I guess!
The seller wasn't interested, and told him that his car broke the cable! So he bought another one. That means he has spent £160 on unofficial unsupported cables. For £250, he could have got the real deal.
Plus I'd rather support Ross Tech directly for the excellent work they've done with VCDS.