Zeo: brief first impression

The Zeo ($250, amazon.com) sleep analysis device has turned out to be entertaining, but I can't say that it has turned up any info useful for glaucoma management, with the exception that it has encouraged me to get more sleep.  In particular , for every night they compute a "Z score" (1..100) to rate the quality of your sleep - since I'm competitive, I've been trying to beat my Z-score each night.  Kind of silly, but on the other hand getting more/better sleep is good for overall health...