Pros: working environment, people, cafeteria
Cons: organization design, confusing and competing strategies, the bloody cold walk from the metro
Although my tenure at the IMF was brief due to my contract, I had the time to get a glimpse of the culture and environment. In short, there are many brilliant people who work at the Fund and seem to strive to ensure the Fund's global reputation and efforts are of the highest quality. This is a challenge given the global economy, the need to be continually agile in responding to new challenges and risks and the political pressures that are put on management to do things in a certain way.
The IT department appears to be a good place to work as does the Office of Internal Audit. The people I worked with were very friendly and always going the extra mile, but they all seem to be in a continual catch-up mode as information doesn't sleep and controls seem to be under constant threat. IT seems to respond to business wanting to be on the "bleeding edge" of technology rather than ensuring the foundational technologies are solid and support business.
The biggest challenge was the maze of the buildings themselves. You need a map! But if you can find the extraordinary cafeteria - these guys have their own sushi bar! - you will find yourself immersed in so many different cultures and languages. That made the experience fun.