The Samsung Gear S2 has a few strong capabilities, from replying to email and SMS to tracking your steps and answering Web search queries with S Voice.
The rotating bezel provides a quick and intuitive way to scroll through menus and read content without touching the display, and the design is very thin and light. However, other major watch platforms provide similar functionality with much larger app ecosystems and additional features such as phone calling(Apple Watch) or extraordinary battery life(Pebble).