Talk. To. The. Graduate students. While I’m not in CAMB at Penn, I do run recruitment for my program here. If I could emphasize one thing over everything else, it is talk to the graduate students as much as possible. The department can say whatever they want, the graduate students will give you the full story.
If you want to hear more about Penn in general, or the Philly area, feel free to message me. People say don’t look at the area you’ll be living in, but you’ll be there for 5+ years so it is mildly important.