I have been using a digital clock watch face with weather, notifications, and calendar, all wake motions turned off, GPS turned off, WiFi turned off, step counter turned off, and have been only using 1.25-1.5% battery per hour with the watch mostly connected to my Note 4 via bluetooth. If I turn on power saving mode, the battery life has been even better. I recently tried the app "Gear S Notification Extender", which works very well, but it has increased the battery drain by an additional 0.5% per hour, so I have disabled the app for now as I have not needed to reply to messages from the watch.
On the days when I am remotely connected to my Note 4 and the battery drain increases to 10-15% per hour, it is understandable considering the power needed to communicate with the cell tower directly from the watch. Overall, I have been very happy with the Gear S and the battery life.
