Having a touch screen is not protected by a glass or plastic plate, I also ordered me this clear screen protector. The delivery came very quickly by mail letter. You have to clean thoroughly before applying the touch screen, preferably with a dust-free Microfastertuch. Then you need a very steady hand, so that the film does not come at an angle on the touch screen. Once installed properly, it keeps virtually forever. And you can even without the mobile phone Tasch stuck in your pocket. Although one should still be careful not to plug in the phone with a keychain together.
Conclusion: The investment in this screen protector is well spent. It should be noted that taking the clear film, and not dull, otherwise the display will show a bit blurry.