Well, I don't really know all that much about it, since I'm not the singer. But from what I've heard Rane say about it, it has tons of mids, which apparently he loves, and it will never ever feedback no matter how close you get it to the monitors. And every show we've played with a soundguy that has never worked with one, the result is always the same. He gets REALLY sketchy about it before we play, because he's never dealt with one before, and doesn't want to. After the set they usually say that they were suprised with it's sound.
As for the loud and not so loud vocals... I have no idea, lol.