Nearly a third of adults are afflicted with a chronic sleep disorder. If you aren't one of those you probably won't have much use for tracking your sleep. Of course you could have a sleep disorder and not know it.
Not trying to be a offensive with the reply here, but does the sleep tracking diagnose you then? Or do you show the data to a physician and they diagnose based on that?
Seems weird it's 1/3 with a sleeping disorder. That's a high number...