After a week of using the Zagg invisible shield on my iPhone 4, I've decided to return it and buy something else. The Orange Peel effect is really annoying, and it's certainly not invisible. The skins also have a rubber feel that I don't care for either. On top of that, it doesn't actually cover the full face of the iPhone 4, and there are gaps on all side of a few mm each. It seems that every day, new bubble appear out of nowhere, and when I put it in my pocked with my keys, they seem to indent the screen, though this is temporary, and some of my friends have noticed it when I show them pictures, etc, and it's very distracting.
I feel I followed the instructions properly and installed it correctly, but for $30 bucks from Best Buy, I don't feel it's worth it. ALL of the screen protectors I've had in the past were truly invisible, but not this one. I should have gotten the three-pack of iPhone 4 screen protectors I saw instead. I would not recommend this product to anyone, regardless of how good their warranty and support is. Sorry Zagg.