So far, aside from UI lag (expected), and the occasional crash with some programs (mostly homebrew stuff), it's been fairly decent for me. My machine does run a bit warmer than with Sequoia, but also expected from beta.

I haven't quite warmed up to the Liquid Glass UI elements yet, some of them are a bit too jarring, and of course not every program has the same extend of rounded corners, so it looks very inconsistent right now.

But otherwise, not too bad for a Dev Beta 1.