I saw it at Interbike and was able to shift it a few times. Its pretty awesome. The shifting is quite fast and smooth. If you think about it...it's just four parts. Two shifters and two derailleurs. The rest of the drivetrain parts can be cobbled together. People are straight nitpicking on the charging. It's no different than charging your phone or any other electrical device. Its really not that difficult to pop the battery off and charge it before going to bed.

Going 1x will even be simpler. That will just be a shifter and rear derailleur.