I use it. Very useful. Lets you know what's running and you can selectively kill apps you don't want running. Also lets you know battery percentage, ram available, how many task are running in the background and also lets you enable or disable data, bluetooth, wifi, etc. Also has an alarm you can set that will go off when your battery gets to a full charge, this is to avoid overcharge if you have a certain battery or phone that this can happen with.
