> Should I use it?
I mean...of course i will say "yes you should!", so I guess I am more curious what you are expecting or if you have specific expectations?
> What should I expect my experience to be?
Mobian uses Phosh as the default environment, so if you have used any Pinephone Distribution with Phosh, that's about what to expect.
If you have not used Phosh....well to be honest I do not know of any good Video reviews for it, but I imagine such videos exist.
> Is the OS stable? Are there apps that crash a lot?
The OS and the apps are stable, Mobian is based on testing/sid, but if we have apps that arenot a part of Debian proper, we try to make sure they are stable.
> Should I be aware of any shortcomings that would hamper a normal phone experience?
Using it as a phone is almost there, but for me, the notable shortcoming is the lack of MMS. This is being worked on (actually I have been the primary person to work on it), and I am hoping it will be included sooner than later (within the next couple of months). I have also been working on getting Visual Voicemail to work.
Wifi Calling also does not work, and no efforts have been made on that.
But Calls, SMS, Voicemail, VoLTE (though this can be carrier dependent) all work!
(You can of course compile the GTK 4 stack yourself if you want. It's Linux after all.)