Pros
Fascinating culture, a true experiment in human, HR and org design dynamics. Some of the smartest people in the world. Interesting training in the fundamentals of anything - from tech to management to economics. it is a place to learn about yourself and question everything you think you know plus learn how to build systems.
Cons
Its not for everyone. Its a closed system with closed rules that you have to buy into in order to succeed in. Transparency and accountability are great but here they often lead to VERY HEAVY bureaucracy. I have not seen or heard of any employee (not executive) changing anything fundamental about the culture. It is a VERY top down organization. Nothing you do here will be relevant to your market value on the outside. nothing. you gain the credibility of being in a tough place with an amazing culture and great people, but you don't actually do anything which builds your external market value. Go here to learn about your self, gain humility and training in how to think. Thats it. The salaries are also pretty good, but not as great as they used to be. There are two faces to every person below the CEO and Chairman - the face looking up and the face looking down. The one looking down is locked in fear. Fear of loosing their incredible salary and not having any value on the market if they are fired because, ultimately, they didn't do anything that is valuable to the outside world and industry.