The chat really has a lot of features of the old IRC (for people who still remember it): options for multiple rooms, private chats, whispers, etc. It has more features than we're actually using on our forum. For me, this was a must have.
Works decently enough. The mobile side of the responsive design could use some work though (at least on the dedicated chat page). On phones, the chat window height should scale to the height of the display in such a way that the text input box and options snap to the bottom of the screen (height changing when the keyboard pops up to match) like you would see in a native chat app. Rocket.chat does a great job of doing this in a web browser.
