Pros: Great people, important work, very fulfilling
A real joy to be an intern there. My managers were fantastic people, very understanding and sensitive to make sure I had valuable work to do, and made sure I was challenged. My responsibilities increased as I demonstrated my capabilities.
The weekly huddles were great opportunities to voice issues and give updates for my work. They got to know me and really listened to me, which didn't happen at previous employments.
For an unpaid internship, it was worth every minute in the experience I gained and the fantastic people I worked with.