ATK is quick to install and easy to use. My buddy told me about it and I loaded it the first day I brought my Droid home. Checking this app a couple times a day and killing random tasks that spring up saves your battery. I usually run it once when I walk into he office, once right after lunch and I've used my Droid to check personal email/news, once in the early afternoon, and once before my drive home. Because honestly, you don't need the weatherchannel app, the corp email app, Skype mobile, and the Amazon mp3 store app firing up during the day while I am sitting behind a desk. Better to save the juice for running Pandora, Google Maps, and other necessities.