Together,
You should really think about this program carefully. I was accepted into this program and turned it down last year. If you are successful during this program, you will have an excellent shot at getting in to medical school, most likely BU. However, be warned that you will be taking classes with the medical students, and it will be very competitive. Furthermore, it is very expensive for what it is.
I turned it down because i had not taken courses like biochem and physiology being an econ major in college. I spoke to the director of the program and he suggested that this program was not right for me, and that i should take courses at a state school at the undegrad level. I think the admissions office for this program doesn't really screen applicants, as there are usually more spots in teh program than there are applications!
If i were you, i would really consider taking classes at somewhere like Harvard Extension school, which will be a LOT cheaper! I think those who are successful in both programs do very well, but the chances of succeeding at Harvard are better, not to mention you save some cash!
Best of luck, and feel free to email me if you have more questions.
Neel