I set it up for my handrolled homelab server automation ( all Arch Linux servers ), back when I was doing everything with virsh.

It worked "ok". It required pulling in a bunch of dependencies I wouldn't have normally installed. I had it set up behind an HAproxy LB, with ssl terminated at the LB. When I was using it ~1 year ago, it was pretty buggy, and certain components would crash and I would have to restart the web page.

Overall it was a mediocre experience, but I suppose better than having to ssh into every server. The main pain point was that I still had to go in to every server, and install cockpit.

In the end, I ended up just moving on to Proxmox. But I suppose cockpit is nice if you don't want a centrally managed cluster, but still want a web interface.