Mine was a factory option on a fully loaded Magnetic Grey model.

It's not too noticeable and really hasn't made any diffrerence one way or another. I probably would not pay extra for it as a dealer option if I had a choice, because I don't put a lot of stuff in my trunk and generally don't ding up the rear bumper cover.

But my Kentucky built TCH had it put on at the factory so I had to take it or wait for another model.