Just got mine yesterday. And yes, it took me a while to get USB debugging on; so I could switch to English. Without those instructions on github, though, it would have been impossible (even though the instructions were not exactly correct for me). I've used MoonReader for years; so UnLauncher, MoonReader; side loaded a bunch of books, and I'm looking forward to this as a Kobo Mini replacement (which is what I would take as a small ereader going out and about).
I don't have a case for it; nor a screen protector--here's hoping I don't drop it or scratch up the screen.
Since I just got it; unknown yet really how much I'll like it over the Mini (I also have a PRS 350; but for small ereader I switched to the Mini a while ago). I'm hoping this will be a new sweet spot mini ereader, though.
I do believe that getting it setup for English was not an easy walk in the park. It was possible--but only because others had done it before me and provided wonderful instructions; otherwise I would have never been able to configure it.