Its cheaper (but you don't get the dock with external HD & keyboard)

Battery management of Sailfish OS has been proven pretty good.

Sailfish by Jolla has the Android compatibility layer already available. So you don't need the hassle with Chrome webbrowser and APK conversion to run Android applicatons on your Linux tablet (if such would be in your interest)

In my opinion this tablet can unite Android compatibility and Linux productivity desktop applications in one device while providing a fluent Sailfish experience that has still a lot of promise.

Too bad it is just a tablet, not a full keyboard slider though.. Probably something to do with current cheap OEM hardware catalogues: choose type smartphone, phablet, tablet, choose two: thickness, weight, quality.