I am using cm-9-20121209-NIGHTLY-e400 and I very much like it.
I only have a couple of minor issues:
1 - Often reboots when I get out of wifi range. I switch off wifi before I leave home/work to prevent this. (no reboots last 2 weeks)
2 - When it reboots it does not start due to the "battery image startup issue". Working around this using the power button when battery image appears. This is only an issue when the phone does a random reboot, When I don't notice this the phone is off for a while.
3 - I did not manage to get the FM radio to work.
Besides these it works great.
Now I noticed the new builds (latest cm-9-20121230-NIGHTLY-e400)....Is it worth while updating to this build, and what is the best procedure to perform the update (just update via RomManager ?? )