Posted 20 November 2012 - 13:43
I have a Galaxy Nexus (Verizon) and Nexus 7 both running Jelly Bean 4.2
I will say on the Nexus 7 (stock, unrooted), I took the OTA, and I have experienced the December bug, and the poor battery life. Other than that, it's rock solid, no slowdowns, no reboots, lockscreen (widgets) work fine.
On the Galaxy Nexus, it's rooted, and running a custom ROM, but I haven't experienced anything but the December bug.
I'm sure Google will come up with a fix. It's not like we haven't heard of such issues happening after an OS upgrade (with a different mobile OS).