This product was easy to use. My husband put it on his iphone and got it perfect the first time. I have used this type of product before and it's all in the prep and going slow. It is crystal clear and does not affect the performance at all. I am a firm believer in protecting the screens so I am glad he has these for his phone. for 4 at this price if we need to replace it for one reason or another I won't feel too bad.