I use it, and its pretty decent. Looks good and works.
Pros: -No user ID needed. -Can self host the server that passes on your messages. -Has the option to use Flux. -Works out of the box.
Cons: -Battery drain is a thing. Either toggle the periodic check, or turn it off and open it yourself to check messages. -Using one account accross multiple devices can be a pain. Since u can't keep using your phone account at the same time as it is connected to your pc. Can be circumvented by having mutiple accounts in the same group chat; but yea it's a pain the ass.
Neutral: -Convincing people to use it hahahh. But this is a universal probem vs mainstream messenger apps.
Final verdict: 4/5. Very good if privacy and anonymity is your number 1 priority. It's less of hassle to set up than some other options, and relatively easy to get people into it. Sent invite, they download the app, make profile and are good to go.
Batterydrain and same use account across multiple devices could and should be better for mainstream adoption. On the other hand if u toggle the periodic checks then I find the drain tolerable. And how many of us are in places that don't have a wallsocket available to charge your phone :p