I bought and love it! And I am not and have never been a screen protector kind of guy. My thoughts have always been that if the protector obscured the view of the screen--in any way--I'd rather risk scratches than use one.
Well I am happy to report that the Crystal film does not obscure my screen at all. If anything it's better than the naked screen, at least as far as fingerprints are concerned. I'd even say the screen "feels" better with the Crystal film on it (not too tacky, not too slick: just right, at least for me).
Before installing it I cleaned my screen with iKlear and made sure I was in a dust free area. It installed fine on the first try (don't think I would ever try re-applying it). While you do have to get it right the first time, at least once it's on it's on (no prolonged drying time, etc.). I did have a few bubbles, but they were easy to rub out. I couldn't get one small bubble remnant out, but it went away on its on by the next day.
I highly recommend this product.
I also have a Best Skins Ever on order. I'll be using it to cover most of the rest of my iPhone (won't be using it for the screen). I keep my iPhone in an Inase sleeve, so I'm hoping the BSE will keep it from getting scratches whilst in the sleeve.
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Mike