I'm sure their are quite a few people that have installed these in the few years that the car has been out.

I have it on my car. I can't say that it made a difference in the handling of my car versus just the rear strut bar. I like the looks of the bar and I'm sure it stiffens up the chassis.

FWIW, a rear sway bar would be a more worthwhile upgrade if you don't have one already.

+1 on investing in the rear sway first...add this afterward or do them together...get ready for that back end swinging out with the rear sway plus this bar.