I've been thinking of buying a ReMarkable, but all I really want is a reader without a backlight that can handle PDFs smoothly. (Ability to mark up is a plus but not necessary.) Based on this thread it seems like the RM/Boox are not really what I'm looking for.
It's e-reader software is a bit meh, so I still read books (fiction, mostly) on my Kindle Paperwhite.