Pretty good movie. Deserves higher imdb score.
This movie is better than most big budget films (usually off the conveyor belt with violence and sex to sell rather than a good and original story) as well as independent films (often with absurd dialogue, nonsensical sequences, and pretensions "artistic" shooting styles).
I think the Undoing story is interesting, the acting not bad, dialogue not bad, and the score really nice. I do care about the characters and being interested the entire time, I'm thinking deep about the protagonist's situations and decisions. Currently the imdb score ins 4.6 and I think that's ridiculous considering the amount of awful and uninteresting big budget movies that get higher scores by default it appears. I'm scoring it a 7.