I have been using it for a week now on the windows of three cars in Niva. With experience from placing some videos on YouTube, I wouldn't put it on windows that open and close, as the film doesn't give me the impression that it will withstand, as it is thin and easily scratches even with the soft spatula it comes with. Despite the high-quality soap solution, I managed to make some scratches, but they are not very visible due to the darkness. It helps prevent scratching with a baby wipe, for example, that I tried on the spatula. Also, throw away the razor blade it comes with because it is not uniformly sharp, and it's better to get a proper razor blade. As for removing it from the backing paper, leave a corner with excess film when cutting it, so you can start peeling from there because it's not easy to find. The result is not perfect, but personally, I don't really care. That's why I gave it three stars. If it withstands over time, I will be very satisfied because it does its job. It's ideal if you have an old car that is not worth spending money on professional tinting and you want to protect yourself from the sun.