Very impressed with this device, it makes reading a joy again (after noticing that reading a lot on traditional mobile device screens was becoming very straining on the eyes very quickly after a while).
With my Kindle I had the issue that I would connect it to a PC and it would switch into drive mode. The screen tells you that you can resume reading while charging by ejecting the device in Windows.
I did it via the small icon next to the clock and the Kindle would stay in the USB drive mode. I then found the Kindle as a Drive when I opened "My Computer". I right clicked the Kindle in that window and chose "Eject" after which I was able to use the device while it was recharging on the PC.
I was a little annoyed by the Kindle keyboard not having dedicated number keys and so far I had to press the Sym key to bring up the window to enter numbers - but no more!
To enter numbers quickly and painlessly with the hardware keyboard of the Kindle just keep the ALT key pressed and use the top row of keys to enter your letters (ALT + T to enter the number 5 for instance).
I hope this helps some of you Kindle users to be less annoyed - I certainly am!
The installation from the Qubes 2.3 i3 installation documentation worked very well, no issues whatsoever. After logging in and back out I was greeted by my familiar desktop (or lack thereof) and was able to make some tweaks to the config file (an ~/.config/i3/config).
I noticed that the Qubes VM Manager was gone. After restarting the laptop and logging back into i3 the manager loaded, though.
Everything seems to be working very well, just have to get used to starting the vm's name when using the dmenu. One glitch that I have noticed, but wasn't able to reproduce, yet, is that some of the icons disappeared from the i3 status bar at random. I think it happened when I reloaded the i3 config, but I am not sure. Will add to the post if I am able to reproduce it.