Let me tell you about my experience with the Zagg tempered glass screen protector. Bought it at Best Buy (big mistake). About 3 weeks after I installed it, I noticed at crack at the bottom, near the home button. The time ran out for me to return it to Best Buy, so I called Zagg. They were quite nice, but only offered me a replacement of the one I had. Plus I had to pay a $5.99 handling fee, in addition to the cost of mailing back the damaged screen protector.
Within 5 days I received my new screen protector. Guess what, when I opened the package, the entire screen protector was shattered! Needless to say, I finally, after much back and forth, was able to get a refund.