Ross, I just got my car back and tinted with 3M's crystalline product. Is that what you got? Do you know which darkness you got (40, 50, 60 or 70) you got on which windows?Ross a klein said:I had my karma tinted this week w 3m, the tech said its key to use a ceramic based tint, not a metallic based product in our cars for optimum Bluetooth and Sirius reception. I hadnt heard or read that before so wanted to share. I also did light for filter but so I could still see in and also not risk night time darkness looking out. I'm very happy.