I have used 3M's product before and loved it, my old jetta had horrible lights and after using it they looked brand new. My friend who helped me do them has done them to all of his cars and loves the product aswell, I havnt had the car I used it on for long enough to tell if it works well after a long period of time but I probably had a total of 5-6 months after using it and they looked just as good as the day I did it.