My wife just got her new 06 Prius with the Nav.system. We've had it about a week and she really likes it. I was just curious if anybody has had their windows tinted and will it affect the Nav.sys. signal or does the darkness of the tint make a difference. I would like to get the rear at least a little darker then the rear passenger sides. The vehicle has no tint now and would like to get done before summer sets in, these Louisiana summers can really get hot!