I've used BC for years, and it has helped. But, I just discovered an app and I gotta say Shades is the only way to go. Ever notice in BC when you lower the brightness you also lose contrast? It gets all hazy and makes me think I have cataracts! Also, when you are done adjusting with BC you have to either minimize the window, or hide the app altogether. Shades doesn't mess with your contrast, and has a handy menu-bar control that's very accessible and gets out of your way by itself. Sorry BC, but you haven't made any progress and now the real deal is here.