I have one and was using it. There are bugs with it. It does work well as far as you get the notifications you are supposed to and it controls your music etc.
Problems however. Talk back bug happens with it and if you use the stock Internet browser, it talks to you with each page loading saying "page loading". Super annoying.
Also, you loose the ability to do one handed screen functionality. Ie. You can't swipe onto the screen from the side and shrink the screen down to make one handed use easier.
The last big issue I had with it was when I didn't wear my Pebble. The stupid pebble app would constantly search for the Pebble. Even when I would press the button in the app telling it not to, it would try to automatically reconnect periodically, like every 30 minutes. This wasted a lot of power, and, I found if I was using my phone with another blue tooth device such as headphones, would cause them to disconnect from the phone each time it would search for the Pebble. I had to resort to freezing the app each time I was not wearing my Pebble.
I quit using it and got a Gear. Now my Pebble is sitting in a drawer.
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