Both my Wife's and my Series 0 watches have taken total craps running WatchOS 3.0.0. We think it's a problem with the activity app itself. Workouts hesitate and stall. Distance stops counting, the clock jumps and stalls, calories stop counting for minutes on end. The activity app sits for minutes until it finally updates with the current calorie count.
And Battery life is the pits. 10% per hour even if you're not running a workout. Instead of ending the day with 15-30% with 2 hours of workouts, I have to charge multiple times!
I've seen the workout complication continue to count even after I've ended a workout. I've seen the LEDs on for many minutes at a time at the end. Many times, the heart rate app just plain fails to take a measurement (no green LEDs).
We get text notifications on the watch that say the messages weren't sent hours after they were sent AND received.
Siri has basically told me she's busy and can't take any commands. I've taken screenshots as proof!
WTF apple? I can't go back to WatchOS2, which was running perfectly for us.
I've rebooted both the watch and the phone, Un-paired, and re-paired the watch. No change. I'm desperate for an update. My watch is becoming unusable.