I have BMW window tint "screens" in my (3)rear windows. I really like them and from ten feet away you can't tell its not real tint. And 100% reverse-able too! I've driven 160 mph with the windows down and they don't pop out either. I would recommend them.
Schöner 135i in Deutschland…
http://www.1addicts.com/forums/showthread.php?t=383375