I wanted the best tint available for heat rejection and needed to special ordered the Prestige Spectra PhotoSync tint (http://www.prestige-films.com/) for my Tesla Model S. Cactus Window Tint was the designated dealer in Arizona. I drove up from Tucson to have the tinting installed on my side windows and back. I chose the 65% tint which is not very dark (for visibility), but has the best heat rejection qualities as it increases IR rejection and gets darker with heat. Rick, the owner, was there every step of the way: from ordering the material to the installation.
I'm extremely happy with the installation and the film and will go back to have my windshield tinted with 75% PhotoSync film.