Installed it on Saturday. Due to the lack of time to install and tune it, the tablet was in my drawer since. With Wifi on! Checked it a couple of times per day, to read my emails easier, but for the next days the phone is the main mean to connect to internet. But (and this is what I want to mention), after 3 days the battery is still at 90%! That is just IMPRESSIVE! Great job.
From what I have checked so far, I did not find any feature not working. The only complain (if you want to call that a complain) is that the Ganbarou wallpapers are not really HD.
But that is just to have something to complain
Samsung Galaxy S4 LTE - Stock, rooted KK 4.4.2
Samsung Galaxy S3 - rooted, S4 Revolution 40.0
Samsung Galaxy Tab 10.1 - rooted, Omni ROM
Xperia Arc S - rooted, AORP 4.4.2
Huawei P1 - rooted, RootBox ROM, JB 4.2.2
Desire HD - rooted, VenomROM - retired to pension/backup phone