Here are some things, the principles that are guiding principles to keep in mind: "" A data-driven health revolution promises to make us all better, faster, and stronger. Living by numbers. "" And this one, which is really telling, this was from July, this cover article: "" The personal metrics movement goes way beyond diet and exercise. It's about tracking every facet of life, from sleep to mood to pain, 24 / 7 / 365. "" Well, I tried this device.