I can only really review the orthopedics department at Children's, which I have to give 5 stars for expertise, kindness, and cartoon animal covered hospital gowns. (Hi, Dr. Mendelssohn!)
Support staff at the hospital are great, and everyone from the parking valets on up are friendly, helpful, and courteous, especially to terrified little kids.
*There used to be an awesome snack cart right inside the hospital parking lot entrance where I'd get a delicious Boston Creme Donut on my way out. I can't guarantee this is still there.