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

I purchased a Screen protector from Ebay ; http://ift.tt/2aEP5u6 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?

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