I love it; it's sleek, fast, and subtle. I like that the messages stay put, making it ideal if someone gets disconnected, I believe. It looks good, keeping out of the way (I didn't see it for a while, at first) and preventing the need for switching between browser tabs, as you only need to click the tab at the bottom, to hide it, which, yes, is similar, but I find it somehow less obtrusive.