Im going to include the Estimate Sheet i got from the Shop which is what i ended up paying once it was done. I thought it was a fair price to which is why i let them do it. Plus they are known for high quality work and if anything were to come about that needed corrected they are very good at backing up their work and correcting things if needed.
As for Visibility, i will explain for now, but will get you a picture of how it looks in the car later... Its a slight blocking but nothing major. Mainly blocks the area where the third brake light is at. When brakes are pressed the light shines on the spoiler and likely not seen (I say likely as im never behind the car to tell since im always driving it lol)... Like i said, i will take a few photos of how it looks in the car looking out so you can see what i mean. but as for does it block your view out the rear to see behind you, no it doesnt. Nothing like the rear headrests did thats for sure.
No offense but you got hosed by that body shop. A gm factory spoiler pay .7 tenths to install so 1.5 was just a rip off. The paint time is a book time and that estimate appears to be wrote on the same program our gm body shop uses so there's no getting around that. But 2.5 hours to install a stripe kit! That's an hour and a half jobat most..and I'm a tech telling u this. You could have got that done for over a hundred bucks cheaper with the same quality if you shopped around a bit..