While it seems to me that Slack and HipChat are similar (and they are), I now know more than 10 people at organizations that switched from HipChat to Slack, and

While it seems to me that Slack and HipChat are similar (and they are), I now know more than 10 people at organizations that switched from HipChat to Slack, and they are all absolutely adamant that Slack is better, and a substantially different experience. I'd really like to work somewhere that uses Slack, as I don't really have a good way to try it out within my workflow.