That film is garbage. "We use non-metallic window tint only - Does not block radio, cellphone etc" They really know what they are talking about.
Dont buy that crap. You ONLY want to use a metallic film. The metal in the film highly reduces fading. ALL FILM WILL FADE. Most newer metallized films will reduce fading, and when it does fade, it fades to a lighter shade of gray. This fading is not even noticeable..so you wont walk out one day and your tint will be lighter, that is not what Im saying.
See if any local shops carry LLumar ATR series. I have always/will always use that line of LLumar's film.