I use on it to keep my postgres data in sync in a high available setup. I host two nodes, each in a different DigitalOcean datacenters (AMS2 and AMS3).
It's fast enough to not notice delays for users. As in, have a user log in on host1, switch the user to host2 and the session is there.
Disclaimer, we're not write heavy and have around one hundred active users.