I’ve been on board since I believe beta 4. I wasn’t sure if it was a good idea or not, but it’s been ok. It seems most of the bugs I have seen are fixed by today’s release, and now that we’re getting weekly updates it will only get better.
Be warned that you cannot choose music that is on your iPhone with your watch. That functionality is gone. Apple has made the music app stand alone for now. Not sure the reasoning to that, but it seems to be intentional.
Yes. It’s working very well even on my series 0 watches. There are no bugs present which affect my daily usage of it and battery life seems the same as 3.2.3 (if that’s what it currently any recall). Also working very well in my partners series 2. No issues with installation at all on any beta so far.
My answer would've been "no" prior to yesterday's beta 6. But beta 6 is a HUGE improvement from previous betas, with significant performance improvements (even for series 0). My answer is now yes, but then again, I've only been using beta 6 for a day so your mileage may vary.