Been running OneUI beta for the last day and so far everything is nice. It took a full day for things to get smooth and snappy, I guess Android builds up its cashes throughout the day or something.
Some nice new features and I'm liking the gesture based navigation especially when typing as it reduces the gap at the bottom of the screen when the keyboard is up.
The visual change with OneUI is really nice, the syste, dark theme is also very nice. It feels more like how you'd expect a Samsung Nexus to feel running the latest Android build.
Neat.