Definitely keep vigilant and expect to have to deal with a few blow ups, because that's what anger issues do. However, don't let it deture you completely. The fact that she was honest with you about what she is going through shows that she is definitely working on it, and is already recovering. The best advice for dealing with anger issues that I have for you, should you decide to stick with it and try to work it out, is to set boundaries, stand firm on them, and try not to engage in negative behavior. Eventually you'll be able to see when she's working herself up, and you'll learn ways to help her defuse the situation at hand. This does NOT mean that she won't slip up; it is very important to remember that. Any issue is difficult to work through, and you have to fall a few times before you truly learn how to glide, but with support and a stable force around, it does make it easier. No matter what your boundaries are, draw the line at abuse. If she starts saying thing just to hurt you or hitting you, you need to leave. Actions have consequences, and while that's a really hard lesson to learn, not allowing her to walk all over you will help her learn to control her temper better.
Best of luck to you.