I have only had time to reinstall all my apps and so on, but it seems pretty good. I'm getting 4.7 linpak scores thanks to jit, and it does all seem very smooth. No obvious bugs so far, other than app2sd not being supported. (Although the ROM is only 50MB, so there's plenty of room for apps).
I'll see how it goes today when it comes to day to day performance and battery life.
The only problem I've had so far was I had trouble downloading an app via the mobile internet. But I think that was caused my weak 2G signal (I am in the middle of a forest atm), rather than the ROM