The ECG app which was one of the features most looked forward to features is missing in action in the update. The app unfortunately will be US only when it launches.
As there is no camera on the Apple Watch the Group FaceTime is limited to audio only.
Shortly after release @AppleSupport on Twitter began to receive reports from users around the world of bricked Apple Watches. The watches get stuck on the Apple Logo screen.
The issue was not affecting all users but Apple obviously determined that it was enough to pull the update. No word from Apple on how to recover the Watches. We’d suggest contacting Apple Support and let us know how you go.