I had a screen protector installed on my Storm during the first week that I got it and I have been using it for about a year. I don't remember what type of screen protector it is but it was installed by a guy at one of those shopping mall kiosks for $10. He claimed it was military grade and virtually bullet proof.
Well about a month ago I decided to get rid of the screen protector as I was having problems typing emails and texts. I just couldn't seem to hit the correct keys anymore. Another annoying problem I was having was during email deletion. When you would try and select one email, it would selected three or four. Surfing the web would also drive you crazy because you couldn't scroll web pages without selecting text.
So after trying numerous screen and keyboard settings, ( I use the settings, 100-100-6) I removed the screen protector and now it's working like it's brand new.
My new every two contract isn't up until next spring but this change in performance should keep me complacent until then.