Obvuously a lot of work went into this, but I don't like the way it automatically renices stuff. A better idea would be to explain to the user what a 'nice' value is, and let them choose the app's priority with a slider or something (a little more intuitive than straight values). Most people, like me, who understand what /usr/bin/renice is will do it in the terminal since it's much faster than using this GUI, IMHO.