I purchased two Pebble watches as part of the original Kickstarter. One failed within a year (we were too distracted at the time to pursue a warranty claim), the other one is still "ticking".
Custom programming my own non-24-hour sleep-wake calendar was a big step for me in finding a cure. It finally put my metabolic reality on equal footing with the world around me, so that I could properly track each on its own terms.
I will always remember my Pebble watch as a life-changing event.
That said, I had doubts about Eric Migicovsky as a venture capitalist right from the beginning. When the original watch was delayed (I've done electronics fabrication before, it's far from easy with so much at stake on a new product) Eric obviously got some advice to keep reality close to the vest, and thus his public comments fell far short of the mark, given the situation. It's actually a flaw in the Kickstarter program that your promised delivery date is locked in stone prior to discovering you've got a landslide on your hands. (How to manage around that, I've never quite figured out. Kickstarter mainly appeals to flighty dreamers—too much honesty could seriously damp the lemming effect.) For my money, Eric failed the test of knowing when and where to draw the line on taking good advice. Any damn fool can advise you to keep your PR powder dry. Actual VC talent is required to know when to blow these damn fools off and venture out into the dangerous territory of actual honesty, while your users still care.
As for the watch itself, I'm still actually using my Pebble watch, for a single reason. Cure now in hand, in bottle form, I continue to wear my watch because its vibrate alarm is harder for me to ignore or forget than any other watch/phone I've had before, so I really do take my sustained-release melatonin at exactly the right time of day, each and every day, without fail.
I turned off BT completely after Fitness App Runkeeper Secretly Tracks Users At All Times, Sends Data to Advertisers because at this level of vigilance investment, extra battery life on both sides was more important than e-mail notification (and I hate pulling out my phone just to check a quick message).