Pros
The best reason to work for Citigroup was the ability to to work in different locations. The company is so huge you can work pretty much in any country if you have the desire to do so. Diversity related to this is also a plus in the company. The diversity is huge in the company. The benefits were also pretty good. The 401k match is decent as long as you don't invest in Citi and their insurance costs seemed about 20% cheaper than others that are relatively the same insurance plan. I appreciated them offering a good Health Savings Account plan. Their domestic partner benefits are also very liberal.
Cons
Citi is a bureaucratic nightmare. It starts with a vague set of marching orders called the shared responsibilities. The Shared Responsibilities have to be read and signed by all employees, then they are never discussed after that. The potential in the company is enormous. Instead of unlocking all the potential in the company it is squandered protecting fiefdoms and covering up mistakes. Besides all the people who have almost wrecked the whole company and banking industry creating and having risky derivatives, the company is way too risk adverse. This makes the spirit of initiative and teamwork not exist at the company.