I'm interested in hearing responses too. I am currently at the HUP practice but not certain if I want to stay there. For DS1, I went the the Bryn Mawr birth center (ended up in Bryn Mawr hospital, though). Ideally I would go back, but now that I have to care for a toddler, it seems a lot farther to get out there (40 mins). I am at Penn anyway during the day, so it's easy to get to HUP for prenatal appts. It's still a good 40 mins to get there for the birth, though.
Anyway, what I know about HUP is that they are happy if you work with a doula, they have some midwives in the practice, but the midwives are on call only 2 out of 7 nights, and also from 8am -5pm M-F. So, depending on when you go into labor, you could get one, but far from any guarantee. I also have not met them yet, so no idea what they're like. Other drawbacks are that they want to monitor you with the belts every 30 mins, which seems ridiculously frequent, and you apparently could have to share a room (? still not so clear on this one, whether that's for labor or recovery). They have 14 labor rooms, of which about half have whirlpool tubs. They say if you want a tub, you should let them know when you're on the way to the hospital, because most women don't use it, and it would be a shame if you got a room without one and wanted to have one.
I have only had one actual appt with the practice, so I can't say too much, though I was pretty satisfied with the responses of the doc I spoke with, and their close following of my early pg experience (I have history of ectopic and early loss).
What I have heard about Pennsy is that they follow a model where you really could get one of a number of people for your labor (more than just the practice you are seeing). However, no personal experience to speak from, so I'm curious about hearing more. I've also heard that there's a birthing suite for the low risk, but it's just one suite, so no guarantee you'll get it.
Drawback of Montgomery hospital I've heard is that it has less capabilities to deal with infant issues, once the baby is born, if that is a concern for you. I can't remember how they classify it, but maybe it's that they don't have a NICU. Not sure. I would be curious to hear how often you have to "check in" with them, or whether the midwife can just use a doppler to follow the baby's heart rate. Please speak up anyone who knows! Also, what is the quality of postpartum care?
Looking forward to hearing more from others!