Have you tried JotterPad?
https://play.google.com/store/apps/d...terpad.x&hl=en
How has your experience been writing on the device? Do you think editing would be easy as well—meaning searching through large documents and inserting sentences/paragraphs, replacing words, etc?
I imagine a feature that could be useful on an eInk screen is page-by-page scroll, so the whole page doesn't have to refresh every time you go to the next line. I'm not aware of any writing program that can do that besides Emacs, which can be configured to scroll this way.
Have you used the stylus much? Google Handwriting Input is interesting in a sense that it can "type" your handwriting as a keyboard alternative. I actually write by hand pretty fast (and qualitatively better), so this is a particularly interesting option.
(I'm considering buying an eInk stylus device in the next couple of months, just FYI.)