I give it 5 stars because it does what it says and does it well! For me, who doesn't exclusively use the iPad with the Apple Pencil but also wants to watch movies/play games, it was a bad choice because it degrades the screen quality and the gaming experience is not nice.
The application with the company's video is easy and definitely protects the screen.

Installation:
The installation is very easy, with detailed instructions and a video from the company.

Experience:
Since I put it on, the writing has reached another level. I write normally as if I'm writing on paper. When you touch it with your nail, you can feel that it's like paper. When you write, you can hear the normal sound that any pencil would make. Previously, it was just the glossy smooth screen of the iPad, now when you touch it with your fingers, it's not as smooth as expected, but don't imagine it to be too rough either.

Personally, I deal with notes and use one of the well-known note-taking applications, with which I could comfortably and well write only with the Ball pen before installing Paperlike. With the other 2 types of pens in the application (fountain pen and brush pen), the letters didn't come out as I personally expected (I had tried all sizes, settings, etc.).
After applying Paperlike, I have set aside the Ball pen and work with the Fountain Pen, without making the letters caricatures like before, but these beautiful calligraphic ones come out without any effort or the need to press the pencil harder.

So far, I am completely satisfied