I decided to take a risk and avoid the "branded" paper-like protector, which costs almost twice as much, partly to see how the "matte" feel is and how it affects the image, and of course, how much it helps with the use of the pen. So, I really like the feel of it. To better understand, comparing the image to a glossy screen (or glass) is like comparing a photo on matte paper to a glossy one - so it's a matter of personal preference. Color-wise and in terms of clarity, everything is good.

Now, as for usability:
a) Fingerprints and reflections are gone, with just a little wiping with a soft cloth to remove the minimal visible traces left by fingers, palms, etc. after intensive use. Also, the feeling in the hand is more "friendly," the somewhat cold feeling of glass has disappeared. It's logical since we're talking about a membrane made of organic material.
b) The pen presses much more securely on the surface - keep in mind that I have a simple active pen from ESR, which is not suitable for graphic designers - but it's perfect for anything else (notes, simple sketches, photos, etc.).

The relatively easy installation for this type/size was done 10 days ago, so I don't have an opinion on its long-term durability. It definitely won't be the same as plain "glass" which is usually thicker. I will come back after a few months of use.

Edit: I also got a Galaxy Tab and... I remembered how terrible the feel and reflections are without the paper feeling, so I immediately ordered one for it as well. Given the opportunity, in terms of durability, everything is good.