It will make you feel bad, really bad; it's that good, truly a good movie.

Rating: 10/10 (23 December 2019)

I read the IMDb's storyline, saw the ratings here and on the other review sites I normally check, avoided reading actual reviews for fear of spoilers, and I was a bit concerned how the movie would make me feel after all that. I was not prepared, nor will you be if you haven't seen it, for a gut-wrenching experience.
It is so well done, from script to tempo, and of course to the acting performances of all the key characters, even the couple's son Henry, played by Azhy Robertson, who is believable rather than just endearing; you will be blown away by the realism of the whole thing.
If you have lived through a break-up, and many of us have, this movie will bring much of that sense of loss you may have experienced, and likely some of the guilt you/we should have. I should not be all that surprised that Noah Baumbach could deliver a good story like this one, after all he has built on past work and I think he will have an impossible time topping this one, as break-ups go.
Adam Driver, as a result of this movie and the earlier 2019 "The Report", is officially on my 'A" list, the one that means future movies of his will automatically go on my 'to watch' list. I was very pleased to see Scarlett Johansson in the Nicole character; she delivered one of, if not the best, performances I've seen from her. She was already on my "A" list, since the 2005 movie 'Match Point'. Now if you desire an in-depth review, I recommend your read the one by ferguson-6 on IMDb.
You must see 'Marriage Story', and good luck with that!