I have a 2021 Mac Mini as my main system, 2017 rMBP as my work system, and 2021 Mac Mini as a Plex server, and they all sit on my desktop. Until UC came out, I used Synergy - and I'm about to disable UC and go back to Synergy. Why? Because UC will just stop functioning/forget a device randomly. During a meeting, as I was using my keyboard and mouse on my main system, it suddenly "forgot" my work computer while I was in a meeting. That lasted about 20 minutes, then randomly came back.
Now it's forgotten my Plex server, which has been working just fine since Monday. No amount of pushing my cursor to the side of the screen is doing anything, and even if I Screen Share with my Plex server, UC still won't recognize it.
The other issue I've had is waking devices up in the morning (none of these devices get shut off at night). I have to Screen Share into each device to get it to wake up instead of UC recognizing an incoming network request from the UC computer with the keyboard and mouse.
I was really, really looking forward to this software, but I have to go back to Synergy. Guess I need to wait for V2 to come out.