Got a Mobilizon instance up and running
In terms of customization and being able to adjust an instance to your aesthetic tastes, it's admittedly weak. User administration is also a bit lacking (I have registrations closed, and so have to use CLI for user account creation). It can be unintuitive - It took me a bit to realize the features are within a Group, and not just exposed up-front.
With all that said - I am extremely happy that Mobilizon exists, and hope to get people away from Facebook.
A little social space created by a person with too much time on their hands, and some friends that wanted a little more control of their online presence.