I have been using mine for about a month and I think the EPUB support deserves a more prominent mention. This makes it a good reader for DRM-free books like those from O'Reilly press.
As far as "apps" go, that's actually kind of a selling point. I've replaced half a dozen notebooks (daily pages, work status and to/dos, work project notes, home project notes, notebooks for 2 classes I'm in) and the blank books I keep around to back up those 6 categories. I'm able to play tic-tac-toe and hangman, I can export crosswords to it, and I haven't had to see one ad or do one oauth exchange.
Now, what I would like to see is the ability to add user templates. I would also like to be able to choose to display my epub in a smaller frame and leave a margin for note.