It doesn't give you info about whether you have staged files (but maybe it should). But it gives you a bunch of other neat stuff, like whether you're in a git-rebase or git-am operation
It definitely can tell you whether you have staged files, because I use it for that among other things. I don't remember how I turned that feature on, but it wasn't hard. Perhaps someone will chime in with the details.
It doesn't give you info about whether you have staged files (but maybe it should). But it gives you a bunch of other neat stuff, like whether you're in a git-rebase or git-am operation