As the proud owner of an iPhone 4, one of the first things I was looking for was a Screen Protector that would be as inconspicuous as possible (hated my previous ZAGG Invisible Shield - horrible feel) - so I ordered the PhoneDevil Magic Crystal Clear of their website after many hours reading other reviews online.
Upon arrival of the Screen Protector you are presented with a padded Jiffy bag containing 2 Screen Protectors, Microfibre Cloth, Credit Card style Calender (squeegee), detailed instructions and a bonus of 2 sweets!
Now, being one who wanted the Screen Protector as low key as possible, I read the instructions, watched Phonedevils great videos and then got ready to apply it. The key to a great finish is in the preparation in my opinion - so I cleaned the phone with a little water, wiped with the microfiber cloth supplied, and as a final thing I used sellotape and dabbed the phone to get ALL traces of dust off.
When the phone was 100% dust free, I applied the screen protector - just took my time and lined it up to the front camera hole and ear piece, then gradually removed the backing that keeps the protector protected (haha) - once the protector is on all you need to to do is take your time and work any air bubbles with the supplied squeegee (Calender).
In total, 5 minutes of preparation - few minutes of applying, couple of minutes removing any small air bubbles - and BINGO you have a invisible screen protector. I have tried cheaper ones on other phones, and to be honest the last a few days the start curling at the edges plus they are never perfect - the PhoneDevil really is!
I have this fitted along with a Apple Bumper, and have tried it with a Griffin Reveal Etch - both fitted without disturbing the PhoneDevil - so total protection and peace of mind for little cost!
For the price, and considering you get two protectors - this is in my opinion the bargain of the year!