I fitted them a while back. Unlike Zhlica i didn't have the problem with vibrations. They are a great addition to OEM mounts and offer a cheap solution to upgrade. I found the clips provided weren't adequate to hold them together and a decent thick cable tie works much better.
Finally picked up a genuine carbon spoon spoiler for it, also sourced a set of spoon lookalike mirrors for painting as i didn't want to go painting a genuine set. I'll update with pictures tomorrow.