I think if I worked primarily in an office environment, I would probably never use any screen protection. But I work in a wood shop, Forget worrying about scratches. I use many chemicals - lacquers, paints, solvents, glues and lubricants. Probably just about any moment of the day I've got something or other on my fingers. I purchased a 3-pack of the stock VZW with my Droid back in Nov. The store tech installed it as he was bragging about how good he was at doing so. Yea, right. 4 huge bubbles. He tried to tell me that's normal, no hassle. I wasn't buying that so I told him I would not accept it. So he told me I could put the second one on. Oh yea? I paid for 3 - I asked for a new 3-pak as he wrecked the first one. After verbally thrashing around back and forth, he finally gave me a new 3 pak - I took them home and installed the first one myself. Two very small bubbles. Okay - no problem. Flash forward to today and that same protector is still on, looking just like the day I installed it, only the 2 bubbles have worked themselves off the screen.
I've had paint, lacquer, wood oil stains, grease and you name it on that protector. Some lacquer thinner moistened on a soft white cotton towel and bingo - looking like new! So there you have it. Going on three months in the battle fields and this stock shield is still doing it's job, invisible and perfect! mike