Rated 3 out of 5 stars

Well, it's better than TB's built-in chat, since I have never been able to get that to work. But this one doesn't provide notifications when new chat messages come in. I mean, at least a colored dot on the system tray icon (as TB does for new email)?!? And it gives no indication of new messages at all (i.e. not even within TB) if you close the chat tab. I was hoping the whole idea of installing an add-in was that it could monitor things. But if I have to keep it open all the time, then I might as well keep a browser window open for it all the time. It's no better or worse then Google's own chat app for Windows (which also has no notifications or system tray operation.