It's Onyx BOOX M96 - 9.7" screen, 1600x1200, running on android. The dpi could be better, there is no backlight and only weird stylus-only touchscreen. Build quality is decent, but nothing amazing, the touchscreen is acceptable if you have the damn stylus around (you can actually take notes on that thing though) It is more or less stock android, with special launcher for ebook part - you can change it though, and it does come with google play. This means you can replace shoddy inbuilt apps with good ones from the store (therefore no issues with supported formats -dvju, epub, fbr, mobi,personalised dictionary,editing doc, excel files (bluetooth keyboard) whatever you want) - it pretty much is an android tablet with eink. However the android comes with no tweaking regarding that - some apps come as black on black - unusable The sheer screen size lets you browse most technical books without zooming. I routinely use it to study for uni. (Thats mainly why i got it)
It is quirky and not that good looking, but it is very usable - the android part works good (if you kill connectivity it will power down after inactivity so battery life is not an issue)
Bottom line is: I'm glad i got it. Play store means i can supplant broken pre installed stuff. Missio critical objective - reading B5/A4 pdfs - works better than i hoped. The isn't pretty or sleek or polished, but it gets the job done and it does it good
PS. Previous version got an community ubuntu flavour, dont know about this one.