Hi Jay Mark. I was a part of the program last summer. From my experience, it was great. Regarding the program itself, there are the three components.
1) KAPLAN test prep: classes usually on Wednesday and Friday. Perfect for students taking the MCAT in August. I took mine in May. So, it didn't really apply here.
2) Lecture series/ clinical: for the lecture, physicians usually come in to talk about topics, such as what to say during an interview, public health programs, what being a doctor entails, and the process after being a doctor. It's really helpful. For my secondaries, I applied some of the knowledge I learned from these lectures. For the clinical, you can shadow at a variety of places, such as peds, OB/GYN, neuro, psych, etc. the benefit of this is that you go to all of the hospitals around Penn.
3) the research component: this is the best part. You get matched with a mentor and do research with them. You don't really get to decide whether you want clinical or basic. The mentor picks for you. I had clinical. It was very great.
In terms of free time, there's a ton of free time that you can do things. Over the weekend, my roommates and I went to New York. For the Fourth of July, Philly does a lot of fun things. If you're not from the Philly area, this program is the perfect one for learning and having a great city experience with some great members. There are two returners. And, they're awesome.
Let me know if you have questions! I'd be happy to talk more about this.