I'm on the dev beta, and it's pretty stable. There's a public beta available now...

nerdjon · on July 17, 2020

I have heard that, my biggest concern is if there was a nasty iCloud bug introduced.

I would run the risk of loosing a lot of important documents in my iCloud Drive.

Maybe I will install it on my work iPhone but that is barely used right now.

yannikyeo · on July 17, 2020

Beta 3 is less stable than beta 2 for some. I normally wait till beta 5 or 6 before installing on real device.