I installed the latest Beta on my GW4 last week and so far I've had zero problems. Battery life is on good. By the end of a full day I have about 30% battery left. I don't have AoD turned on and no LTE. The only strange thing I saw is when it first installed the heart rate monitor screen was very different until the screen went off and back on again, then it reverted to the standard it was before. Not an issue but a weird quirk. All in all it seems good. No lag, no battery drain (at least for me).
I've had beta for almost 2 months and I almost had no issues at all. The only issue I had is that not alot of my apps were showing up and once it connected to my phone I went to see if you can add the apps and magically it just appeared.The one thing I didn't like about the beta before the Beta 3 version is that once you Turn on your watch after powering off it took over 5 minutes. Other than that I think this is a really good beta and It's not bad as people say it is.
