I should've went for this. I instead went for the iFrogz anti-glare screen protectors and they look like utter garbage. They fit well, protect the screen well and really cut back on the grease/fingerprints/grime you get on the glass, but they make the retina display look like the screen is wet with pixelation/rainbow effect.
I also bought a Belkin gripview case which is actually pretty nice though.
It was funny, they had the Invisible Shield for Sprint phones on clearance for $1.99 and $2.99, and the same material for the iPhone mere feet away was $27.99 or something like that.
I did have the Best Skins Ever for iPhone and a Best Skins Ever for my 2G and 3G iPhones, and they were nice, so maybe I'll take the iFrogz back and exchange them for the Invisible Shield.