Pros
I worked at Bridgewater for a little under a year. They are always hiring for HR because they divide it into Recruiting and HR. And they always are in need for recruiters because their turnover is very high. The culture on the HR side is not as intense as the culture is on the recruiting side since the recruiting department is more involved with the "money" and therefore more exposed to the culture. But crazy stuff aside Bridgewater can be a good place if you end up with a good team!
Cons
For the most part I think their culture is interesting/borderline unproductive. It can be very intense at times because they tend to nit pick at what you do wrong even if it's something small. And focus on those issues rather than the work you are supposed to be doing. Which can be very stressful.