Benefits:
- Good battery life. One week as I take every day about 30 / 60minutes: yet the remaining battery
- Some interesting functions (double telephone).
- Also used to connect the GPS phone to the car stereo
Disadvantage:
- White not very aesthetic (for my taste).
- Headphones supplied top.
Anyway, with Xiaomi Piston is perfect.
It only needs to add support for headsets and remote controls that would be perfect!