Last night I spent quite a bit of time revisiting some of the existing watch faces to see what has changed with the beta. I found lots of interesting little tweaks: new color choices, new animations, lots of new faces, all around a lot of fun upgrades and tweaks to existing watch faces. It's worth giving them a try and checking out ones that you may have not really liked before because now I'm really enjoying the smoother animations and just overall experience with these faces.
