Maybe I'm being overly critical. But it's nothing revolutionary or new, we've had Bluetooth mesh chat for a long time. In fact I vaguely remember seeing it as someone's a university masters project over 10 years ago.
I'm more interested in the lo-ra mesh, but that's probably because it feels more mysterious to me, as I have little understanding of radio networks.
Let's not even get started on the name (b*tch@).
But I must admit it is cool that it's open source. I'll keep a eye out for an android app