Its fairly stable, desktop and web clients, accessible for non-tech members of the company, decent UI, various API hooks and hubot access, easier and faster to

Its fairly stable, desktop and web clients, accessible for non-tech members of the company, decent UI, various API hooks and hubot access, easier and faster to get up and running/ maintain then a home rolled XMPP/IRC. If you just need a functional company chat client, its solid.