Review on Easily Install and Remove Magnetic Privacy Screen Filter for Macbook Pro 13 Inch (2016-2020) and Macbook Air 13 Inch 2018-2020 (A1932,A2179) - Anti Glare by Everald Mendez

This is a good screen protector, but it doesn't really "black out" the screen. For example, if I leave this on Facebook, you can say I'm on the site even though you don't see the letters, but my screen is still visible. I have another cheaper screen protector, one on a different display that protects the screen better at the angles described without showing what you're using, so that's a little disappointing. For the price, however, I'd suggest looking elsewhere if you're looking for something to "black out" your screen. However, if you don't mind that the screen is visible and everything else is hidden and there is a "magnetic" feature, then you're fine.