I put the new OS on my watch and it feels quite good. Very stable and no bugs to report. App launches are indeed very quick. However, i did found a big downside to the new OS : the music app is now more cumbersome to use. Before : I'm, for example, at the gym listening to music. When i wanted to change a song, i just use glances (swipe up, pause and forward in a second). It works great : fast, intuitive and very responsive. Now : I have to press a button, select the music app, tap it to get into the app and only then i can use its functions. I hope they can fix it, because the usability of the music app has gone down a lot for me. Or maybe i'm just doing it wrong??