I installed it since 30/12 with clear data.
In my opinion it works great and its fast, so it can be used normally, even if its beta.
Everything is polished and there are some nice new details, as new notifications, new open call floating icon, fast camera focus, etc
Root, exposed work fine too
I already upgraded my Flyme OS 18.104.22.168 Beta. It works good and smooth. I am really glad to see some new trasition. But The major problem, Its not Global version. Its compatible Chinese and also many Chinese language and even “Google Map” also Chinese. If you are a Chinese, You can use it without any hesitated. Thank you very much