I've probably had 10-12 ZAGG tempered glass screen protectors on my iPhones since the 6...and every single one had issues with the edges not staying glued down either a little bit or whole lot so that it had the dreaded "halo effect". To their credit, their customer service is second to none...and they even sent me two of their high-dollar Sapphire infused ones. They both did the same thing. Sure glad I didn't pay $60 a pop for those at retail!
Frankly, I don't think there are any that fit well and stay put. I loved the fit on the flat screen of my 5 & 5s, but the curved edges of todays smartphone screens have really made it impossible for perfection.
I am currently using a plain ZAGG Glass protector...and yes, it looks horrid but I'm afraid to run a naked screen, so I guess I'll have to suffer through it.
