Pros
I find there to be a really smart and engaged group of people. The research department feels like the "heart" of Bridgewater - there are many smart people who care a lot about each other. The actual culture (openness, honesty) is great. A lot of reasonable people telling each other what they really think.
Cons
Bridgewater is extremely hierarchical, bureaucratic, and rigid. It is an extraordinarily difficult place to try and get things done. Many people feel like their job was oversold, and you're not allowed to switch jobs in your first year or more. There are just way too many people. There are often meetings (several a week) with one analyst and multiple managers checking in. Bridgewater actually employs 3000+ people, about half consultants, many contentless managers, and the headcount appears to keep growing while the company more or less manages the same amount of money doing similar things. This translates to most people not feeling impactful. From the conversations I had, compensation is fair but not good or bad.