Been running the PA ROM since release (8/10) and i think it's great.
There are definitely some bugs but i would say half of them are due to the early nature of CM10 and JB and not the PA ROM itself. most of the tablet/phablet/hybrid features work great and is definitely daily driver worthy IMO
Here are some of the bugs i noticed:
1. Sometimes after a configuration change, the system asks me for a SIM unlock code. At first i was afraid i lost my IMEI but after i clicked dismiss, it works fine (this only happened a few times after initial flash but hasn't happened since)
2. Wifi toggle in tablet mode seems broken. People have said a re-DL/re-flash fixes but i prefer phablet mode anyway
3. Battery percentage in tablet mode doesn't show when enabled
4. Sometimes after switching modes, my screen goes black. After a manual soft reset (hold down power for like 10 sec), boots up fine in new mode. The "sleep-of-death" will also happen to me randomly sometimes
dig through the dev thread though. some others have reported bugs like unable to send texts/make calls or other potential deal-breakers but none of these happen to me. if you do jump ship, flash with TWRP (almost perfect results from what i can tell using TWRP instead of CWM, with no reported incidents of IMEI loss)
This is in addition to the normal bugs you will find in the CM10 nightlies. I've read that a lot of those bugs have been addressed in more recent nightly builds so hopefully we get an updated ROM soon!
Overall i am LOVING PA