Pros
Had an internship here, it's fine if you enjoy the lottery system of department placement. Manager was actually helpful (shocking, I know), and most people were friendly enough. Some departments will teach you things, others will teach you the art of looking busy.
Cons
Company culture exists on paper. Workplace drama happens, but don't worry, as an intern, you're invisible anyway.
Bottom line: Be prepared to create your own learning experience, because nobody else will. It's not terrible, but your mileage will definitely vary depending on where they stick you.