I’m now on the Beta, from the original developer preview 
I regret flashing it at 11pm after a damn long day 
I messed up 
But now that it’s all happy and installed, seems fine - but as I’ve learned through many years of this, it’s a BAD idea unless you’re completely fine with it ‘breaking’ unexpectedly.
The 1st preview was rock solid for me, but YMMV this Beta seems very smooth (I’ve had it for <12hrs though so take that with a pinch of salt
You can always flash back to your last stable update, assuming you’re rocking a Pixel device? (And know what you’re doing)
I wouldn’t recommend running it but I’m running it on mine 