Congrats on the interview, this means you are 90% in, you just have to convence them you want to go there.
I'm pretty familar with the school being I will be attending Pikeville this fall, lived there 21 years of my life, and my father graduated from PCSOM. As a school goes, it's a great atmosphere and has a wonderful facility. The school really emphasizes, being primary care docs, in underserved areas (preference giving to ones who want to work in Appalachia). This is the main thing to getting into PCSOM, they actually rejected higher MCATs and GPAs because they are looking for docs who believe in the area and staying there. They also have some pretty good rotation sites. Plus, for 25,000 per year they pay for everything (laptop, books, opp table, boards, review course for boards, and a handful of other things).
As interviews goes, I know they are going to interview 120 people for 75 spots. Right now they have accepted 20 and interviewed 30. So, I wish you all the best...if you have anymore questions feel free to ask away, I'll be glad to answer.