Review on Targus 4Vu Privacy Filter Screen for 24-Inch Widescreen (16:10 Aspect Ratio) Monitor (ASF24WUSZ) by Brian Thuo

That was a horrible waste of money. I work with another person who bought a different brand and it works great. It was just a big waste. The person has to be about 5 feet either side to not see your screen, and even then it's about 70% dark, not black, or not visible at all. It also doesn't matter how far they are from you, 20 feet, they can still see the screen. As far as I know it will be black to anyone not sitting directly in front of a computer screen.