Pros
I sensed from the beginning that this wasn't like any other nonprofit organization where I had worked before. There's a strong sense of mission and ownership of the work by almost every professional -- which creates a fun, engaging atmosphere and culture. The pace is fast and there are clear expectations for performance, but overall the culture is very fair. It tends to attract top talent in, and outside of, the nonprofit industry. It's a fantastic place to learn, grow, and work with a sense of passion toward a great mission -- which is helping treat, research, and educate about children's mental health and learning disorders. Highly recommended.
Cons
If you are not the type of professional who handles constructive criticism well, or if you prefer a slower pace in your work, this may not be for you. Child Mind Institute functions more like a for-profit company at times, with what can be a demanding work load and intense schedule. (That said, the days are fairly traditional business hours, 9:00 to 5:30 or 6:00.) If you like this sort of challenge, however, it's a great place to experience many new opportunities and grow.