Pros
Employees are all very bright. Good support for the most part. Challenging, intellectual projects. Great office space.
Cons
You are more likely to be stuck with unsupportive, passive aggressive management and "leadership" than great management (which does exist here). The former puts on a different face for upper management, so the true awfulness remains unseen and unchanged. You will work like a dog and not make anything near your peers, so be prepared. Passive aggressive behavior and backstabbing in client services is the norm. Creative is held in high regard and works the least hours, so that's your best bet. Internal processes are laborious and some exist just to give someone a job. Many employees have left but the attitude is they couldn't cut it. Failures are rarely examined.