Well, it does its job. Indeed, nothing is visible from the sides, the screen quality remains the same, however the biggest problem is that the fingerprint recognition does not work at all.

It does not recognize the fingerprint and additionally distorts the image as it is darker than it should be and has very small, fine, black dots.

Personally, it's the first time I'm using a privacy screen protector, so I don't know if it's the same with other products, but with this specific one, I have a serious issue with the fingerprint sensor... it doesn't work, it doesn't even let my finger be recognized to unlock the phone... Also, I notice that the screen is generally a bit darker even when looking at it from the front, and the darkening effect is only for the sides, not for the other directions.