I tried putting the invishield on my iPhone 4 a month ago and it didn't turn out too well. I got the spray everywhere and got extremely paranoid that it was going to get into the phone and ruin it. I'm currently using a PowerSupport anti-glare screen protector and it's working great, but, really hindering the retina display. I've really liked the look and feel of every zagg I've come into contact with but have been really paranoid about that liquid that comes with it. Tonight I bought another zagg for my iphone 4 and am going to either research the hell out of how to put it on, or have a friend install it for me who's done skinomi's multiple times, which is essentially the same thing. My question is this: Can anyone give me tips, tricks, etc? Did I waste my money (because the zagg gets awful reviews on amazon)?