GS3 and Screen Protectors--Needed?

Hey guys,

I just wanted to know if anyone uses their S3 sans a screen shield, and if so, what's the experience like? Is a shield needed on the S3? Is it Gorilla Glass? I was thinking of not using one.

Also, anybody know what the best anti-glare shields are, in case I ever decide to use one, or should I just stick with the Zagg no matter what?

Thanks guys.