My first watch I used was the Moto 360 V2. But this one had a problem with the passive fitness sensor (Motorola sensor). Which is not fully supported at the moment by android. So i switched over to the LG Urbane.
The “fitness tracker” parts are still under development.
adb forward tcp:4444 localabstract:/adb-hub
adb connect localhost:4444
then the watch asked me to authorize with the computer.