I read all the reviews about this movie while watching it. Whether it was rated 9/10 or 1/10, they were all correct. Ultimately how you will react to this movie depends on what sort of person you are.
If you like correctness, accuracy, and expect everything to be right and make sense in a movie, you will hate this, score it badly, and agree with all the negative reviews.
If what drives you is emotion, seeing beauty even when it's surrounded by flaws, if you have a strong anima, and if you love Emily Blunt - then watch this movie.
