I heard that bbs had a problem with the anthracite finish and could not garentee a perfect finish on them, but could if you chose the standard silver..
I fitted a brand new set of VZ's 2 months ago.. Seem ok, but I've not tried off roading in them..
Can't beat the quality of OEM products..
If you look at the price of the OEM CHs on the Audi compared to the price of the VZs there's a huge difference.
For Basically the same wheel..
I would say the build quality and finish are reflect in this...