Pros
They have some great clients, and there are some good people there too - if you're lucky to get on a team with them. Edelman is comparable to other large agencies in the area.
Cons
Company politics run the agency. HR/senior leaders treat their employees as replaceable, and they're not afraid to admit it. In fact, the first thing my manager said to me was "no one here cares about your career except yourself" - if you want to make it here, you have to be cutthroat and willing to throw people under the bus, otherwise you will be the one thrown under the bus, and you won't grow. Edelman also thinks it's enough to pay you with "you're working for the top agency, so we don't have to pay as much!" There are PLENTY of better agencies in the area, Edelman!