Pros
Amazing talent across the network (and knowledge sharing has become a much higher priority in recent months.) Edelman knows good people when they see them and do their best to retain them, whether it's through extended sick leave when a family is ill or footing the bill for an expensive conference. On the west coast (potentially elsewhere), they put a big emphasis on ongoing education, as well as getting to know/like your colleagues on a personal level, with bi-annual retreats. Depending on your team and manager, there is a LOT of room for professional growth and junior level team members are often given an unusual amount of responsibility based on good performance. In order to succeed at Edelman, you have to ask for what you want. As long as you make a case for your desires (especially concerning career path) and speak up early and often, you're generally rewarded.
Cons
At times, very long hours. Work/life balance isn't necessarily a myth, but it can be difficult. The salary also seems to be lower than industry standard. Your experience greatly depends on your team and manager. If you don't secure advocates for yourself and learn how to navigate the process/politics, it's very possible that you'll get overlooked for promotions, raises, etc.