I worked on the Hope Unit for a few years as an RN. I learned so much about mental health, and even myself. The difference that i made in the patients' lives was priceless. I've been able to use a lot of what I learned there at other jobs. Nursing management is very political, almost like a popularity contest. If you suck up to the right people you can probably secure yourself a charge nurse or management role. Strong opinions or anything that goes against the grain will not be tolerated. You will definitely be a "yes" person. And what was said earlier about Menninger burning through social workers is the truth.
Overall it's a great place to work. The food and landscaping were my favorite things about working there. The gym is nice too.