hey, im a 3rd year currently doing my peds clerkship at mfch, so i can answer a little bit about the hospital, but not much about the residency, specifically.
as far as i can tell, the residents really love the program. compared to other clerkships that ive done, the residents seem really happy and well-adjusted, if you know what i mean. the hospital is gorgeous and theres a lot of room just for residents (huge on-call rooms, resident lounge, several large conference rooms). the faculty is very knowledgable and approachable, and i havent seen any examples of residents being talked down to or belittled. morning report does leave some room for improvement, ive heard, but students arent invited, so no first-hand experience there.
as for money, the residency is relatively high paying, but like drv mentioned the cost of living in westchester is higher than in other areas, though of course not as high as in the city. westchester medical center has had some financial difficulties recently, but the hospital just received a large amount of money from the state, and things seem to be getting back on track, for now anyway. also, the childrens hospital is so well privately funded that while wmcs financial problems would affect ancillary care, clinics, etc, i dont think they would make a huge impact on the pediatric residency as a whole.
what else are you looking for? if i dont know, ill ask one of my residents...