This movie very accurately portrays the growing pains that any marriage and any family experiences. It does so with great humor and shows, rather than tells, the effect that an outsider may have in being the catalyst for the necessary growth. All of the characters are sympathetic, even the ostensible interloper portrayed by Mark Ruffalo.
As the movie reveals the strengths and weaknesses of each character, much attention is paid to the details that reveal their specific personalities. That is what makes this a great movie.
Saw this last night and thoroughly enjoyed it. There is a great scene when Julia and Paul Child are looking for Julia's sister at the train station. It was the best evocation of two Americans reuniting on a Paris train station platform I've ever seen. I know it doesn't sound like much, but great acting comes out of such small moments. This movie has plenty of them. Unfortunately, the scenes in Queens and New York city seem claustrophobic by comparison. That is where the movie fails. The conceit around cooking through a book written over 40 years ago falls flat, mainly because Julia Child's life and work were so much more than a basis for someone's blog to-do list.