I am using it and tbh didn’t have too many issues with it. It runs as a LXC on my Proxmox server.

With that it’s a fairly comfortable setup - it does have API access on the proxmox node and therefore automatically discovers all LXCs,even the ones you add after the installation.

For other machines I use a fairly easy bash script to download the agent 2 and then overwrite the config file with the right parameters,but that’s just me being lazy - it’s not that much work doing it by hand as well.

And for everything else there is always SNMP which is fairly well supported and there are tons of templates nowadays.

Tbh, I had Prometheus/Grafana before and found it to be much more complicated, especially when you need active and passive nodes.