On the day to day level, it crashes even more than Slack, and syncs badly.
The pettiest and weirdest part is it doesn’t signal edited messages. The editing window is super short, but it still feels like being moonlighted when you read something and 2 secs later it’s a different thing.
You cannot edit comments in Hipchat. I can talk about other issues as well but not editing comments is a deal breaker for me.
HipChat works with Pidgin, which doesn't support edits, I imagine you'll see something similar as with the Discord edit feature when you're connected via Pidgin (you get a new message, prefixed with EDIT:).
It often fails to notify of new direct messages, I suspect thinking one device was active when it was received.
There was a long thread I didn't follow at all about how that was how it was supposed work.
That's when I switched to Slack.