So, I'm constantly dropping my phone. My screen is a major concern for me and so I always have a stock of screen protectors on hand. I'm so glad that I got these. Where other protectors would have shown damage, these didn't. They are definitely stronger that the other ones I have tried. Those were great for protecting the screen but also required that I replace them frequently. I don't have this problem with the Professional Quantum Series. I've dropped the phone many times already, which would have normally required that I replace the screen protector but I haven't had to place this one at all.
I did notice that when the packaging came, it only mentioned the 8 and 7. I was a little concerned by this because it was clearly advertised as fitting the 6s. No worries though, it fits the 6s without any problems. They just don't advertise it on the packaging, most likely because so many newer models are already out.