Pros
Fairly laid back atmosphere. People get along, and work together well - not much workplace strife. Some positions have opportunities for travel. Decent hours and pay, for an NGO. Good policies for things like sick leave, maternity leave, etc.
Cons
If you're looking to be a journalist.. look elsewhere. This is a place for people interested in nonprofit mgmt. Not much dynamism here, it is a 'quiet' sort of organization. There is a lot of micromanagement, which can get frustrating. Not much room for growth for entry-level employees. For a young person, this is a fine place to work for a year or so, but you will probably not stay long after that. It is not an instantly recognizable organization - takes some explaining when you tell people where you work.