Got my S4 a couple of days ago. I had a free screen protector installed as part of the package, looked fine at the store, but now that I have it home its completely awful. It makes things blurry and bright colors have this bad rainbow effect.
I'm the type of person that takes good care of my stuff, and I'm starting to wonder if I even need a screen protector. I've had my iPod touch (1st gen) since the day it came out, have used it just about every single day, take it with me everywhere. To this day theres still not a scratch on the screen. I'm not familiar with the type of glass used in that thing compared to the S4. Google searches seem to be all over the place. Lots of people just getting scratches putting it in their pocket, some are fine.
I'd rather have some opinions from GAF in this thread.