Pros
The cafeteria with its free food, an easy commute by multiple subways, good location in Midtown, great view from the top floor, the aquariums, night classes about the finance industry.
Cons
Management thinks they are a software company, rather than an information provider, so they waste tremendous effort building solutions from scratch, rather than using a commercial solution. The UI for the Bloomberg Terminal is a joke--every recent MBA must think, "Wow, that's something my grandpa might have used." The Terminal's email is its most-used function, yet it introduced Rich Text (you know, the ability to bold and underline words) only in 2012! And the net installations of those Terminals determines almost 50% of your annual bonus. The company has dealt with numerous sexual harrassment allegations, and the stories of managers yelling at employees and even throwing phones at them are legendary. That culture continues at the company, with numerous managers incompetent at their job but who are excellent at bullying employees and treating everything as an immediate emergency. Finally, keeping with their 1980s mentality, they don't let you work from home, even when half the subway lines stop running because of a blizzard. You'll get a call from the manager (who lives 3 blocks away) wondering why you're not at work yet.