My experience on the battery pack: The lasts me for about 10-12 hours youtube at medium screen brightness (and that's pretty light).
Power, processing, optics, etc. is all great. It would actually be perfect (five star), were not there two things:
- The lack of HDMI port (but you can compensate with Miracast and appropriate adapter, therefore no rating trigger)
- But two star deduction for the permanently installed batteries! (I know that now account for all, but that makes a crime against humanity, not better. Planned Obsolescence says hello!)
OT: An update on KitKat is available, but I recommend to install only after you have googled for "KitKat SD Card". Maybe you're like me to the people who disturb this new "feature" ... In the case can only be update or rooten helps.