Pros
You get six weeks of vacation to try to manage the burnout from your job.
Cons
I'm embarrassed to work at the United Nations. As an employee, I don't see a work environment that corresponds to any of its purported values. The organization frequently chooses failure. Projects that should take months stretch on to years. Work that should be done by staff is handed to consultants. Outputs are often of low quality. There is zero will to change or improve. I've seen a deep lack of integrity in hiring. Managers refuse to consider highly qualified people. Unqualified people are allowed to pass interviews, even if they fail the assessment. People who lack intelligence, social skills or any work ethic get promoted. There is zero career development or training. I regret joining the organization and feel stuck there.