Their screen protectors for the iPhone 5/5s were great...at least the self-healing ones were. They also had an anti-glare version, but I never tried that. I haven't tried the Tech21 Impact Shields for the 6/6+ yet, although I did see some negative reviews for the anti-glare version on the Apple Store website. If I were you, I'd go for the self-healing version--it's been around longer and probably has more of the kinks worked out.
Kristin