I interviewed at dartmouth last year and have nothing but good things to say about the place. its a extremely beautiful brand new hospital with great mostly harvard / dartmouth trained attendings who are all very brilliant and nice. Its a great general peds training program with almost no fellows anywhere to "get in the way" of your general peds training. I remember them saying that you can even do electives at boston childrens and many of the residents graduate to go to boston childrens for fellowships because of their very strong connection. Its in a great part of the country if ur an outdoors kinda person and like being in that part of the country which is the only reason more people dont go there. i could probably go on and on why i really liked it and im sure most people would say the same.
good luck