The sleep thing is important IMO. That's extremely useful data to have. Feel tired? Check your sleep then remember what you did the day before to mess it up (dr

The sleep thing is important IMO. That's extremely useful data to have. Feel tired? Check your sleep then remember what you did the day before to mess it up (drink/bed late/eating etc). Trains you to sleep better which is the most important thing in a productive life. But Apple watch doesn't make it easy to do both yet.