I have had my watch for close to two years now. A recent update to 4.9.1 are terrible on my Pixel 3. The application is terribly slow to sync, seems to drain battery, stopped syncing with Google Fit. Uninstalling and then installing again didn't fix the issue. I went back to 4.8.1 and all the issues went away. Whoever did SQA on the app dropped the ball.