Instructions are confusing, application is a challenge, and results can be disappointing. Be aware modern windscreens are double curved, which requires to cut away a large part of the foil at center location of the windscreen (see what happens when you put for instance straight sticky tape on the top part of your windscreen). On my VW Golf IV I had only 7.5cm width left in the middle, which disappoints in sun blocking effectiveness. Because it looks ugly that the middle part is 7.5cm, and the left and right side 15cm, I had to cut away about half of the foil in the end. On a flat surface my cut foil looked then like banana-shape, but on my windscreen it is a straight band. Cutting of the top part is done by following the top window contour, the bottom part I did with a pair of scissors in order to get an even-width band. Foil is then applied on the inside of the windscreen, which is difficult to do because of gravity. Also challenging is to get all straight without wrinkles and air bubbles. To add to complexity: a tiny Foliatec logo is also in the middle of the foil, which you might want to have in the middle of your windscreen as well. Take note of how your rear view mirror is attached when you consider to buy this foil: is it attached to the inside of your windscreen, and where exactly? On the positive side: I still can see the traffic lights through the foil, car looks a bit more cool, and the rare moments the sun is exactly at the correct hight it helps blocking it. Try to find pre-cut foil, or order a windscreen which includes a sun strip when you have to replace your windscreen.