It basically runs linux but I don't like it too much mainly because the UI isn't suited for the keyboard and the little mouse roller (which is terrible). A form factor like this really needs an entire GUI targetted specifically for it, instead this uses XFCE.
I would say if someone made a GUI specifically targetting the DevTerm it would be great. If you exclusively use a mouseless interface then I would say this is actually quite good in the sense that it's this portable retro thing you can bring to places. But compared to say a small linux ultrabook, the ultrabook is lightyears ahead of this.
Only get this if you want something with retro vibes.