Cool article. Slightly OT, but one of the things I love about my Pebble is how I never miss the vibrations, nor imagine them when they're not there. When I had my phone set to ring, I often didn't hear it, and when I had it on silent and vibrate, I would get both misses (especially when bicycling or walking) and false alarms. I suspect that the wrist is more sensitive to vibrations, so with Pebble, it's easier for my brain not to screw this up.