I have the License plate PDC retrofit kit sitting around in the garage for a few weeks and just now that I finally have the time to install it (I even had time to install the grocery gripper). I have to admit that I somewhat regret not spending the extra $700 bucks on OEM PDC when I ordered the X a few years back. But this retrofit kit somewhat makes up for it and I'm very pleased with the result! Attached is a couple of pics, but you would hardly notice it on the black beast

I'll do a write up on the install if anyone is interested.
BTW...Thanks to the site sponsor, Morristown BMW, for the great discounted price and Mike/Nick for the great services/helps.