I have the gts rep and it holds-up very good. Minor fitment issues at first! But with a little sanding and paint, it came out perfectly. Once I skewed it into the bumper, everything was spot on. It's a little heavy, but not to were it will disrupt the bumper.
The only problem that i have is that my bumper got warped on the lower right side due to the CF lip I had on there at first.
I was backing out of a driveway and the damn thing ripped off
(CF is too stiff, so if it hooks onto something? It will pull and then rip off).
The damage isn't night & day, it just sticks out by a little less than half a inch from the right air duct. You will have to get up in personal to notice it.
I will pick a PU lip over a CF lip any day.