Pros
As open and transparent as I think any company could be - a clear set of values and principles on which the company is run which provides a framework for anyone to contribute if they want to. You get to work with some super-smart people and generally the quality of conversation is an order of magnitude better than other places I have worked at.
Cons
Bridgewater is facing some growing pains as it moves from being a small company run by Ray Dalio to something more institutionalized. Some of the principles that have worked well at a small level don't necessarily scale well, which results (for example) in managers through the ranks translating principles in a sometimes back handed way. Bridgewater lacks a bit of a sense of humor - there is a fair amount of attention in the company on meaningful relationships, but the reality is everyone is pretty intensely focused on their business responsibility. I made fewer good friends at BW than other places I worked. Because Bridgewater can hire great people given its brand, pay is ok but not great in most roles and unless you are in the top tier of the company long term progression is unlikely. But for three to five years, a great experience for most people who get past the first eighteen months,