I like that it allows us as developers, designers etc., who don't have access to each other's code bases fulltime, but do need an easy way of accessing them from our own workstations. Also, being able for people outside my team (who are not allowed direct access) to be part of discussions via chat makes me happy! It can be difficult when we want someone else on another continent/country/state away to join an ongoing conversation with others - they cant just click "join" or something similar…