PC on off Auto

This will turn your computer off when no one is using it. That is really cool because if I forgot to turn of my computer it would automatically turn my computer off. I would use it to save power. I wonder if it would turn off if you are on. Then I wonder  if it would be a pain for it to turn off and then for you to always turn it back on. That would drive me crazy because I would hate to have to turn it on and off so much. I love that it is free. I wish everything was free.