(I'm a Jeff 4th yr)
One could say that the strength of the program lies in its attendings. They are, for the most part, very dedicated to teaching.
The work life can be rough, from what I see, and from I hear from my older friends who have stayed on at Jeff. They definitely stay very busy, and the call system is a strict q4 team call (but there's night float 7days/week) (but call still goes until 10 pm). The upside of all this, though, is that the interns end up incredibly confident in their skills. We rotate through a lot of hospitals in the Jeff system, and I really feel that the Jeff Hospital intmed interns are the most confident and comfortable in their abilities. Some of my friends said the first few months were really rough, what with getting used to the high work load and busy census, but I really saw a difference in them by the end of last year, and they were happy.
As for fellowships, yeah, they're solid, but not as outstanding as a more prestigious school. That being said, it's a matter of which of the programs in their subspecialty of choice they get into. Most all of them get into what they want. Also, Jeff itself has some good fellowships.
Let's see... what else... Program director's a very nice guy. Facilities are pretty decent. The hospital is certainly not hotel-ish like some places you see nowadays, but it's nice for a downtown hospital. They're up to speed electronically, with the exception of still having hand-written progress notes. Vitals are logged in the computer. Oh yeah, and there's generally a terminal between every couple of rooms, so it's never tough to find a computer.
Not sure how much info you wanted... Looks like you may not be able to interview. If you've got plenty of good choices already, I can't see why you'd need to rearrange to interview here. It's a great program in my mind, but there are a lot of great programs. Maybe if you're particular about the Philly area...