The biggest problems with BU are the culture and the price tag.
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There is a malignant teaching culture at BU, be prepared to be harassed in personal and inappropriate ways and your commitment to medicine mocked. It is what it is, an old school way of teaching through harassment. The administration faculty have been there forever, in some ways dislike students or having to interact with them, and are really perplexed that there are students who are focused on giving back such as through international work/teaching or research.
Be careful not to step on any toes or better yet, do not spend much time interacting with clinical faculty or student/academic affairs as they can make your life very difficult. If the school was high quality in terms of a focus on clinical excellence and research and real social justice work through attendings who cared to mentor, (or even just answer a couple questions about international health work), then it might be worth it, but lack of mentorship, malignant teaching culture and few resources for related activities such as global health work or research (which the school doesn’t support for medical students, but masters students get the red carpet rolled out for them), make it a less attractive school.
Of course students aren’t perfect, (though most attendings don’t like to teach at BU and are perplexed it is a teaching hospital and hate “spoon feeding” students), in the age of #metoo, a lot happens at BU that shouldn’t be permissible any longer.