Has anyone used www.vag-tec.com to install any aftermarket OEM kit? I want to get OEM parking sensors (audio/visual) installed on our Sharan. CGTI has a discount agreed with Vag-tec for paid members, and their quoted prices seem reasonable regardless. I'm now just looking for info/reviews on vag-tec to find out what experience other people have of their service/quality of work. I've googled them, and one thread on the Audi A1 forum has come up, but other than that, nada... Anyone used them in the past?