I am using this since 1 and 1/2 month.
And got update installed few days back.
Found some issued that need solution.
1. SIM card can't be turned off individually.
2. After Nov 30th update release. Root is lost.
3. UI hangs a lot and battery drain too quick after the update.
4. Proximity sensor works when fresh reboot. After 2 or 3 calls the sensor doesn't turn the screen off during calls.
Request / suggestion : it would be better if zen UI 4 could be used as default UI and all ZEN apps like calling, calc, menu interface etc included. (Tried installing ASUS ZEN UI4 but faced problems).