i interviewed at tufts, harvard, and hopkins. i got into tufts. these are my biased impressions:
tufts: pros: boston, laidback class. cons: expenses (tuition and living), not really a research school, if you care about that.
harvard: pros: almost everything, but especially the students. cons: ive heard people say that people can be competitive due to their large egos, but could be just a rumor. other than that, nothing really. words cant describe how much i liked harvard.
hopkins: pros: great school, you will be set for residency, learn from some of the top-notch physicians in the world. cons: students seemed uptight and extremely type-A, also it is in the ghetto. i didnt like hopkins that much.
hope this helps. let me know if you want me to elaborate on one of my statements.