I had tried the Zagg HD screen protector and was very disappointed in the results. We have the Moshi screen protector on our iPad and loved it, so I decided to try it on my iPhone. I love it on it's own, but with any kind of phone case, it bubbles in the middle and falls off frequently. I have yet to find an iPhone case that doesn't cause it to bubble and/or fall off. I hope I can because I really do love this product on it's own.