Great Screen Protector for S8
This protector even comes with a guide to help you fit it. It makes it easier. But you still have to be careful to get it aligned. Slow and steady! No second chances.
It is glass to so don't drop it or it will break. It should prevent your screen from cracking. Which wouldn't be worth replacing cost wise today.
It does what it's designed for. But don't expect miracles.