Pros
You will probably never meet a bunch of nicer co-workers who share in the grief and misery of working in such a bad place. There is a great deal of sympathy for each other. Co-workers treat each other as family members. This is one of the main reasons why many people stay with the company for much longer than they anticipate. The location of the office mean that people can travel to the office easily. There are good transport links, and the office is conveniently situated for access to a wide range of amenities. There are a lot of places to go to during lunch.
Cons
Where to start? Bad management style, incompetent management, lack of leadership qualities of senior managers, promotions not based on merit but nepotism, draconian and unachievable targets, periodically being lied to and treating employees with disrespect. Business schools should use CoStar as an example of how not to manage, and how not to treat workers. The people at the top are the 'old boys network'. Don't even bother expressing your opinion. You will be talked down and your attitude will be questioned, and you will be shown the door. If you want to grovel for a promotion and become part of the old boys network , good luck. They will only listen to you if they like the look of you, and if you submit to their management style.