I saw this on television on the late show when I was still in high school. I have yearned to see it again ever since.
From what I remember, a very interesting insight into the grooming of a young American heir apparent.
I was struck by the Family scenes in Boston with Joseph Sr... the famous football games in the yard... (much like the ones we used to have in our own yard when I was a kid) The portrayal of life in a bomber wing in England during WWII during the bombing of Germany... The love story between Joseph Jr. with a woman who may or may not have been an appropriate match. A well crafted film that shows so many moments in the life of a family in a time of crisis. And the ending is superb.
One scene shows a dinner at the Kennedy home after JFK's near scrape with death after the sinking of his PT boat in the Pacific. A guest makes an awkward toast to the "hero of the Kennedy family" to which Joe jr graciously rises and says "To my brother Jack". I remember feeling the thrill of seeing these private moments.