What Screen Protector would you recommend for a Sony Zperia Z3 D6633.

I purchased a Screen protector from Ebay ; http://www.ebay.com/itm/390972400778...%3AMEBIDX%3AIT It cracked under the edge one day, and one day I found a crack that I thought was the phone itself but, after running my fingernail along the surface I knew it was the protector itself after my nail caught where I thought the screen had cracked underneath the protector.
My question is, does anyone have any protectors they recommend and live by? for a Sony Xperia Z3 D6633?