Hi,
I also got in the Dartmouth Program and I'm looking for more insight on it. I like it because it is a one year program and you get a broad view of public health which I think is useful. However, if you want to focus your studying I think the epi specific programs would probably be better.
My friend did the epi program at JHSPH and she's doing research now (as in working fulltime). Also, the MHS (in epi) is a 2 year program (but JHSPH is the number one school of public health so I don't know, I recently submitted my application for MHS in mental health at JHSPH because I am not convinced by Dartmouth).
Did you attend/view the webinar? Dartmouth seems to be located in the middle of nowhere and the students said that you need a car. I like Hopkins location more, more options, and transportation! I mean probably Columbia wins on location but with that said Columbia is probably the most expensive.
I am pretty sure columbia is a 2 year program as well so you also have to think about that!