Excerpt: I just purchased this 19" filter and received it the exact next day even though I did not request nor pay for next day delivery. Having said that this19" filter FITS PERFECTLY like a hand in glove and there are two options as far as affixing the filter over the monitor. I had ordered a prior filter from a well known website and IT did not fit well at all.
Pros: Easy To Set Up, Ensures Privacy, Reduces Eye Strain, Reduces Glare
Excerpt: Privacy is not as good as I had hoped. View is darkened as you move to the side but much of it is still legible. The data is definitely NOT clear even when viewing spot on. The adhesive tabs are tricky to line up with the filter and I doubt they'll last.
Summary: I work in an open office, with sensitive client info on the screen throughout the day. This works very well for side-view blocking; however, if someone is directly behind me the screen is still visible (which actually is a plus, because if the screen was blacked out completely then even I wouldn't be able to see it!).