My first phone (I joined Sprint April 12th last year, so first phone w/ Sprint) was an Insticnt S30 (garbage) and bought the Zagg Invisashield for it.. no more than a few days later the screen felt like an old orange peel, a week or two later and the screen its self began changing color and started to peel. I always keep my phones in the best condistion possible so that I can sell them once upgrade season rolls around. Needless to say, I sold my S30 just a few weeks later cause the Pre launched and I bought Ghost -Armor and it was a perfect marrige. The skin stayed on for months. I also owned the touchstone and the backplate that goes on the Pre its self was a rubberized back and the skin still latched on like glue.
I went golfing with my brother and took out my Pre to show it off to my iphone lover and brother and in doing so droped it from just below waist high (my pocket) and the skin looked pulled and the phone even looked chiped. I peeled back the skin to find the skin was damaged, but the phone looked spotless. I will only order Ghost-Armor period. It's a thinner skin and I know that its not quite as protective as Zagg, but I'd rather have somthing that A.) isn't noticable & B.) stays on to actually potect the phone.
Pro's: No tacky feeling, stays on longer, when completly dry can't tell it's on. It's a thinner skin so don't try and take a knife to it like the youtube video's depicte you can do with a Zagg skin, but protects from objects found in your pocket or purse.
Cons:
Not as thick as Zagg, less protection