Perfectly simple! Forget all that digital nonsense and set your timer the old and best way. I use this little guy to control my sump light for my reef tank, I like to have it run for 2 hours and off for 1 hour from midnight to 8am. Push the little toggles down and plug it in, set the current time and let it run. If the power goes out there is no need to fuss with losing your programs, just turn the dial back to the current time and its reset, ready to run your programmed times over and over. No muss no fuss (what's muss?), sure its not fancy but I want to spend as little time as possible messing with supposedly 'automated' products that need more tending to then they are worth. Love it, dual outlets, love it, override switch, love it!