[plusz]

I have updated today and I'm very happy. Finally I don't have to use additional apps to make the most out of the reader. The only app which is still a must for me is "Buttons remapper". I use it to assign actions to the physical menu button, task switch on press, open android settings app on long press.

The caveats
The firmware has bugs if started with other launcher than the default. I got ReLaunchX after upgrade and two major issues happened:
1. The app optimisation for native apps did not work
2. The touch-disable icon (the hand) on the android task bar did disable touch and did not allow to enable it again, reboot was required to get touch working again.

Lucking all works well when using the native launcher app and it's actually quite good. I like the native launcher. The "Storage" screen has improved enough to be quite handy (they could allow to decrease the font and icon size to make it even more practical - it's unnecessarily such big!)

I really like the new e-ink refresh modes. The "speed mode" looks and behaves really well. Of course I also got surprised how nice movie plays in the new "X mode" but I'm not impressed by watching movies in B&W.

EDIT:
Deleted rant about Supermemo Actually there was an update of the app on Play store which fixed the issue.