I've had my TCL Note A1 NXTPAPER from Kickstarter for about 24h. It's taken me all this time just to figure out how to work around the lack of Google services so I can use this the way I want to: not just notes/books, but for sheet music as well. I haven't even gotten to books yet.
I finally found a way to get my sheet music and chord charts set up in my preferred app and played around with the pen in the notes app for about 5 minutes (hmmm). I should tackle books next but this has been a slog so far and I'm tired.