I stayed at the Holiday Inn on Presidential Blvd. It's the one in the pamphlet that has a free shuttle to the medical school campus in the morning.
As far as my situation, I flew into Philadelphia on Saturday and stayed with a friend of mine downtown who goes to Jefferson. My interview was on Monday, so I kinda bummed around Philly for a couple of days which was fun. I even saw Liberty Bell, Independence Hall, etc., as it was 3 blocks from where my friend lived.
I took a shuttle ($10--Lady Liberty) from the airport to downtown Philly. I took a cab ($19 including tip) from downtown to the Holiday Inn. Hotel shuttle (free) from Holiday Inn to medical school. Then took a limo service ($18-20$ with tip--USA Limo) from medical school to airport. Both Laby Liberty and USA Limo were great, the cab was just a cab.
Hope this helps and I recommend seeing some of Philly while you're there, if you're not from the East coast like country bumpkin' Ohioan me.