Pros
Amazing staff and amazing projects. Your supervisors are willing to give you as much work as you ask for. The projects do great work and as an intern, you learn a lot!
Plus, interns receive a travel stipend which is a lot more than other internships in Washington, DC offer.
Cons
Some days can be tedious, but you're an intern- just try and keep busy by going to events and asking for more responsibilities, even in different departments.