Pros
Well respected company with decent benefits. You will have the opportunity to work with some very well-known clients. As a result, the approach is extremely process-heavy. If you can master that, should be able to handle almost anything. This is a great place to elevate your career in event management. There is frequent management meetings to share and celebrate successes and new directions. They have a flexible PTO program which allows you to take off as much as your leader will allow as well as being able to work from home at times. They have many team-building events, a somewhat stocked kitchen.
Cons
Like working at most agencies, the pay and benefits are lower than at most direct corporate opportunities. As a result, I saw many people who have been there a few years resign to move on in their careers.