Easy to use?
You could say that. After waiting for the "It's safe to use electronic devices on this flight" announcement, simply select one of three sleep programs including Rainy Day, Beach Sleep, and Desert Wind (or download others like Monk Chant, Amazon Rainforest, etc.), and adjust both the amount of time you want to doze and type of alarm (Harps, Xylophone, Gong) you wish to gently rustle you from restful slumber when it's time to land. That's it. Literally. From there, hit "Start" and fall asleep dreaming about something other than that "hilarious" episode where Paul accidentally loses his passport at the airport.