Ok, another question for those of you who have tinted your windows. There is a lot of talk on other forums about how metal films will affect radio signals (cell phones, GPS, sat radio, keyless entry). Anyone have any experience, good or bad? I'm not worried about radio reception (outside antenna), or GPS (windshield won't be tinted), but what about the tire pressure warning system. My guess is it isn't a problem, but would like some feedback.