It's been a little over 6 months and I am glad that the Zenwatch 2 hasn't exhibited any strange behaviour (i.e. random battery drain, sync disconnects, lagging or being unresponsive, etc). I am still enjoying an average of 2 days of battery life with: The screen brightness set to 2; Minimalist watch face; Screen set to always on; Notifications set to normal; Deleting the Zenwatch Manager and using only the Android Wear app.