My husband and I just each got new iPhone 13s so I picked this 2-pack out in a hurry and trusted the reviews. It's very nice glass and the easiest screen that I've ever applied. The frame helper makes it impossible for the placement to be off. I improved by the time I applied the second screen. With my first one, I got a few small bubbles that were barely visible but they were gone today. (I applied them yesterday) Just take your time smoothing it as you go,...from the bottom of the phone upward toward the FT camera and you'll be good.
I can't speak for how protective it is. My husband and I have never broken a phone but you never know.
I cannot tell one bit of difference in the iPhone screen's operation. It's just as receptive with the protector on it as it was without. That said, I much prefer a glass protector over plastic any day. They are always more expensive, but totally worth it. It is very hard to tell that there's even a protector on the phones.