I have had to install a lot of screen protectors on iPhones. For myself, my family and my extended family and friends, and this was without a doubt the easiest to install and with the best results! The frame which centers the screen protectors is genius! It makes it so much easier to place the screen protector. And then the protector goes down perfectly with no trapped air bubbles or lack of adhesion. Perfect every time! I used this for 5 iPhones, and it took only about 3 minutes per phone. The screen protectors have held up well and after a month of use none of them show the slightest scratch. Highly recommend.