This topic was posted over on the BOF, but I figured I would ask here as well. What's the deal with metallic versus ceramic tint? Does metallic tint interfere with the car's antenna/systems in any way, but ceramic tint doesn't? Is ceramic tint more expensive? Do they look any different? I'm planning on tinting all windows, except the windshield but I can't have the tint interfere with anything in the car. B8BB8B mentioned that his car can't get a GPS fix with the front windows (tinted) closed. Does anyone know where the GPS antenna is located and does the tint really block the GPS signal? Are any other antennas inside the car or can anything else be affected by tint? What about Wi-Fi? Thanks!