Pros
Never had the chance to learn so many valuable digital marketing or data skills anywhere else! These guys are absolutely wizards when it comes to the technical aspects and marketing analytics. The CEO is a brilliant math guy whose brain works at a different level. Yeah he changes directions quickly, but he's a data and numbers nerd who experiments like a scientist. He's constantly raising the bar and pushing people to do better. Doesn't waste time and tells it like it is. If you can accept the challenge to learn from someone like him, I don't think there is a better internship.
Cons
None really. Not for the thin skinned. If you pretend to know what you're doing, the guy in charge will call you out. He also expects you to understand things quickly so pay attention when he speaks or you'll get lost.