Pretty close. The movie in my mind when reading the spec was better than the final product, but still pretty good. I think a different director might have improved it a little. If you like that, check out other Dan Fogelman scripts like MY MOTHER'S CURSE.
Loved the script and read it some 6-7 months before I saw the movie. I felt the movie was very close to the script, particularly when compared to how some films look in relation to the script.