I had her as a steward and I could not stand her.
Anytime you even get near her, she will challenge you to a fight,tell you you are weak and or how tough she is, and make other comments like "keep walking if you know whats good for you".This is all the same dialogue she has prior to becoming a steward and it's not that annoyting considering she sits by herself in the back of the Bannered Mare so you normally would not experience this add naseum.
Other than the dialogue (that was terrible and terribly annoying),I did not have any bugs with her at all.Very competent in a fight.