just got my iPhone 6 plus and i went with the zagg invisibleshield glass
i looked around and theres so many opinions on screen protectors that its ridiculous to read sometimes..
i went with this one for simple reasons:
1. it does it's sole purpose well - protect the screen from MINOR bumps and bruises
2. lifetime warranty - not many companies can offer this
3. offered locally - if it does crack or break (which it will eventually), i can stop by a bestbuy and have it replaced for free
at the end of the day, its made of GLASS..it's not indestructible. i've read a lot of complaints on it about it cracking easily. well with a lifetime warranty and being 5 minutes away from me, i'd pay a little bit more knowing i can just get a new one as soon as it breaks, without having to send it in and waiting weeks for a new one