We are delighted with film five years out from when we put it on the buses. We used the Hüper Optik Drei film. It has a cleaner look, and does a great job of reducing heat into the bus and blocking UV rays. Our police department has also commented to me how much they like the film, since they can look into the buses and observe misbehavior, whereas the old dark films did not allow them to see into the bus."