Paying $800 for tint is absurd, in my opinion. Shop around and you can find someone to install the same ceramic tint for less then half that price.
I was quoted $350 but I still couldn't justify it. It does keep the heat out better than metal film, but I'm happy with the look of the metal film so I went for that at $170 installed. It was the highest grade metal film they had available and comes with a five year warranty.
Oh and don't let anyone try to up-sell you to ceramic tint because metal film kills radio reception. I've had zero issues with radio reception. With iPod, Podcasts, Pandora, Spotify and Sirius, who listens to AM/FM radio anyway? lol