Tons of threads about screen protectors.
Check those out.
i always go with a clear protect from ebay. I end up getting 6 for like $5 and i change them out if they get scathed or starts to not look clear.
Normally i can go about 6months without a problem. Other times its been a yr.
The never used a glass protector before but i have heard that some of them are very hard to get off and then its still glass so it can scratch. While others will loose there glue and come off.
Illome flex. No problems with the glue though I haven't needed to take it off. Yeah it can scratch but it's much harder to scratch than a plastic protector. You can't even begin to compare to clarity and feel of a plastic protector to glass either.
I like the Verizon TPU Holster/Case, and so wanted as thin a protector as possible. It's a little on the pricey side, but I went with the 'Just Like Glass Nano' and am extremely pleased with it. Just as thin as a plastic screen protector, but with the clarity and smooth surface texture of glass. Gives me the best of both worlds.