I used it for a while on a community, and then I abandoned it like I've been doing recently with the Steam chat. Sometimes it's just 10x harder to get any work done with it open because I'm the type of person that reads everything that is said and reads backlog when he leaves.
So, yeah, avoiding chats. I did like it when we did use it, solely for the bot that you could interact with in clever ways. Like, getting admin/voice you'd have to say "ruby" in some way, shape or form, and it was always amusing coming up with a new one when I joined =P
EDIT: Occasionally feeling like this about the forums, as I keep reading threads I have no interest in reading >>