It is a set it and forget it sort of thing CWS. I set up my rice cooker before I leave for work and I tell it to be done at 6:30pm then at 6:30pm on the dot my rice is ready and waiting for me. If I am not ready to eat at 6:30 then the rice cooker goes into keep warm mode (for up to 12 hours) to keep the rice ready, but not overcook it.
It takes all the guesswork out of making rice. You put in your rice and your liquid and turn it on. The cooker determines (by moisture level) when the rice is cooked perfectly and then it stops cooking.