It's fast and stable, as a starter.
The good:
All previous frankenfroyo roms' problems - echo, battery, led - are solved.
No - to be precise, NO - echo in calls. At all. Voice is clear and loud. No way to reproduce echo or white noise.
720p works out of the box for MP4, whereas for H264 it gets to 800x480p (which I have to check whether or not is worse...)
Bluetooth has a new stack and as for now is perfect.
Wifi is stronger. When using frankenfroyo roms I got only two lines of antenna on the second floor of my house. now I get from three to four. no placebo effect...
Froyo App2sd works ok.
Led works as a charm.
A final note regarding the battery. I have been using wifi, browsing for 20', making two phone calls for 15', installing apps, moving files in sd card, etc. since 100 minutes, and battery has gone down by 5%. Which is outstanding to me. More info tonight after 12 hours of work with everything always on.
The bad:
The rom is not a final one, nonetheless.
udK and Maja are ironing out the bugs - there are few, still, which need so.
Stay tuned.