I am a novice on window tinting, never had any car tinted before. I visited my local tinted shop and he recommended the Llumar film. Any ideas or comments on this brand? My intent of tinting my Model S (upcoming) is for blocking the heat in my area during summer, not for looks or try to keep interior magical. I don't want to do the front windshield except may be the top 4-5" assuming there is no tinting on Model S (correct?), only the side windows and hatch back window. I am concern about difficult to see at night if I go to 35% (legal limit in NC). What if I do 40%, 50%, etc? Comment?