I use Brave everyday as a secondary browser, particularly when I need to access sites that run anti-ad blocking scripts which Brave handles better than any other solution I’m aware of. And of course I use Brave to get familiar with the Brave payments system.
Keep in mind this is a fairly early beta; version 0.20.29 just came out today; dozens of issues and bugs were fixed: https://github.com/brave/browser-laptop/releases
I'm pretty happy with it. I do notice some sites are wonky in it compared to Chrome, most notably medium. However I don't visit those sites very often and when I do if it becomes an issue I just open it in Chrome and then come back to Brave. I have it set as my default browser and there is a notable lag when clicking a link in Slack or another non-browser app for the tab to open in Brave. A minor annoyance but not really an issue for me.
I'm content with it.
On mobile, Brave with PIA's killswitch enabled for daily browsing but it doesn't matter because of GCM and I can't seem to rid myself entirely of Google.
I'm not really interested in the whole BAT thing that Brave is trying, and haven't heard much else about privacy or security lately.