I had both the LG G Watch R and a 1st gen Moto 360, but for my purposes which lean heavily toward activity/sport use, my Garmin Forerunner 235 (used with my Note 5) has won me over.
The Forerunner 235 has all I really need - simple notifications for texts, emails, and apps (configurable by app), accurate and quick GPS to track runs, accurate activity and sleep tracking (on par with my old Jawbone Up24), wrist heart rate which works well for me (I wore it and a chest strap for a short while to compare #s and it proved accurate with only slight lags during quick changes during intervals). Lastly, add battery life that runs circles around my other watches.
The 235's screen isn't as beautiful as either the LG or Moto, but it is the best screen I've used in bright daylight.