Installed MR1 Build 4 (4.2.2) and haven't stumbled upon too many bugs. The only ones I could find is problems with network provided time (doesn't set the timezone accordingly) and touch to zoom on the camera. EDIT: There also appears to be a problem with the battery history showing inaccurate wake times. For example, the graph shows the screen has been on and I was using the device however the device was not "awake" at the time. Other than that it seems rather solid.
Another important note here is the reduced amount of wlan_rx_wake wakelocks. I've tried many aosp roms with different kernel combinations and could not for the life of me find a combination that wasn't plagued by this wakelock. On my university network, on other roms, wlan_rx_wake kept my device awake 90% of the time, tested the newest aokp build today (stock kernel) and this wakelock kept my device awake perhaps 5% of the time. This is only a preliminary finding as the university could have adjusted settings on the network etc, but as of now it appears the wakelock has been reduced for me.