UPDATE: after the background fix was released, my pebble now only shows me one of my 3 available sonos zones. Its never the same zone that shows up. This bug makes the app pretty much useless to me now.
It works pretty well, just not consistently. Could evolve into a solid app. There seems to be an order in opening apps to get it connected: Sonos app, then Kronos companion app followed by Kronos on the Pebble. That seems to be the only way I can get it to work. If any of the apps are already open. Close them and open in this order.
The app will disconnect if your phone locks, (I believe a fix is on the way).
Sometimes, the app does not refresh the song playing. And sometimes is randomly disconnects. Which forces you to reconnect, following the above process.
One big annoyance is everytime you press a button, the pebble vibrates! Dont really see the point.
I look forward to future updates. I think it could be a great app. Just think $4.99 is a little much for it, but I paid it.