Comment on ScreenShade

I used this app for a time, but oddly I couldn't make it open at login. I tried setting this within the app's preferences and directly trough the Accounts preference panel, but it kept removing itself from the list.
Finally, I found Shades (http://osx.iusethis.com/app/shades) which accomplishes the same thing but in a really better way. And it's also free.