I use it. It's extremely easy to setup your own server and I got mine running in about 30 minutes following their instructions. Aside from issues around key exchange in earlier versions, it's been great and on par with Discord or Slack, and with similar reliability.
I've been told the apps (Android/iOS) aren't as good as the Desktop version by coworkers.
I've been told the apps (Android/iOS) aren't as good as the Desktop version by coworkers.