All great questions! Even though I'm not in clinical years yet, I'm only MSI, even now, clinical exposure has been great! Through Intro to Clinical Medicine, from the very first week of interview, you learn how to interview patients, communicate with them correctly to get the info you need, and now, at the start of second semester, we're learning how to do physical exams (vitals, cardiopulmonary exams, abdominal exam, etc). And to do that, we spend 3 hours/week shadowing a doctor (it can be someone from family medicine or some specialist...personally, I have a urologist). So clinical exposure has been better than I ever expected.
I believe the shuttle from undergrad campus runs every half-hour on weekdays and maybe every hour on weekends? I'm not totally sure but it's really easy to find this info on BUSM site. If you're actually looking for it and can't find it, let me know and I'll try to get it for you. The gym on the undergrad campus is realllllly nice, since BU is a D1 school....they have great workout equipment, many bball courts, any stuff you'd want. The South End gym (med school campus gym) is decent...it's not big, but it has a bball court where a bunch of us always play pick up ball a few days a week, a pool, and then workout equipment (cardio and lifting). So it's not big and it prob doesn't have "complicated" equipment but it's totally find if you need to do some cardio/lift for an hour.
Now in terms of textbooks....you usually don't need them because the syllabi are so well-put together and so full of info already. The only book I've really used so far has been Netter's for anatomy, Neuroscience atlas, and biochem review book...oh and the physical exam book....but I feel like you could use that book your whole life, it's pretty awesome. So, I think you can get by most classes without getting the textbook.
Professors do a great job with feedback. All of the course directors so far have done an excellent job with really listening to students and asking for feedback on almost everything. If you are ever struggling and need help, there are many people you can ask, starting from your classmates, and then tutors, and professors doors are always open. We also have SAC committees, where around 10 classmates meet with professors every week or so and provide feedback about class or give concerns, and the professors give feedback right away. So, that's been pretty great too since I've been on a SAC committee myself.
Biggest negative is prob the cost. BU is expensive and there's no way getting around it. But personally, for me, I am really happy with BU so far and at least for now,I think it's worth it.
Any more questions?