What do you think of privacy screen protectors?

[Raris]

What do you guys think of privacy screen protectors? It's where people can't see what's your doing on your iPhone from the side.

 

[twiggy0]

Privacy Screen Protecters are pretty useful in certain situation, like if you go on public transportation a lot, or you just want to keep your stuff private. What most people don't know is that you don't have to spend more than $3 for them... I linked one for $2.71 shipped.

iPhone 4 Privacy Screen

If you have an iPhone 3G or 3GS, I found one for $2.40 shipped.

iPhone 3G/3GS Privacy Screen