Best of luck with your interview! I had mine with Mary Mazzola in December. It was very relaxed and friendly. She spent the first 10 minutes reviewing the program with me, then asked me questions about my resume/experience (which she had clearly read over), then asked if I had any questions about Penn/the program. She also asked a couple general interview questions like “What are your greatest strengths?” and “Why are you interested in Penn’s SP2 program?” The whole thing took about 45 minutes, and you find out about your admission within two weeks of the interview!