Pros
Not many left. There used to be some respect and team atmosphere. Some of the buildings are ok. All I can really think of as a solid positive is probably having Citi on your resume might open doors for you else where.
Cons
Intensely political, meaning that who you know matters far more than anything else. Game playing management tactics abound. If you are not playing golf and loosing to the boss in the right way they'll manage you out. Not many people are fired, management will have a lot of fun managing you out. There is so much deadwood due to political promotions, the buddy system and sheer machinations that there are very few competent enough to do the work. If you are demonstrating you know your job and are willing to go the extra mile then woe to you. Essentially what happens is all the work that should have been done by favorites will be loaded onto you. They set you up to fail. They will joke about you in management meetings. "that fool, that looser" How do you survive? Fit in. Find out immediately what your department managers are like. If you are a xerox copy of them, maybe you'll be invited into the club. You'll get 1's and 2's no matter what. Ramble on in endless sentences in the interminable meetings. Ape the speech patterns of the bosses. Basically the culture is hard core Brooklyn NYC: antagonistic, cut throat, devious and full of power games. It's street hustling, machiavellian types that get ahead. If you are professional, forget it. This is a filthy knife fight in the streets. Departments are rival gangs. It all comes down to fists. The little people by and large are nice. They don't get promoted. They don't fit in. Don't be nice. Don't play by the rules. It's better to drive the work than do the work. That's what's valued. The work is nothing. Talk loud and interrupt others. Be unpredictable. Make the work harder and criticize everyone and everything below you. Make your coworkers look like fools. Humiliate, denigrate, subvert, undermine. Suck up to those above you.