Flawlessly upgraded from spyke555 cm 10.1, cwm, to bubor's twm, and pac_i927_4.4.Alpha-1_20140416-104602.zip, and change-fstab.zip.
I'm still learning my way around. Wifi hotspot, camera/camcorder, kill app by back button, set up gsm network account fine. Great, thanks.
One thing I really appreciate is getting into my external sd card, which I never did with the earlier rom. Also I had intermittent reboots that always, always, lost permissions in such a way as to prevent network access until I fixed perms.