This screen protector comes with the easiest installation guide I have ever used. Installing it is SUCH a breeze! You'll get perfect alignment every time. Just make sure there's no dust anywhere that can get underneath it while you're installing it. At the phone store they kept telling me I couldn't use a full coverage screen protector with the Lifeproof Next case because the case would inevitably peel the edges of the screen protector up and it would eventually come off. But, as I tried the Next case on with this screen protector which I had already purchased and installed on my phone, it fit like a glove. And it has continued to be a perfect fit. There is literally no gap between my phone case and my screen protector.