The film is very faithful to the book and achieve success most of the humorous scenes. Nat and Gabi are very good characters and the film brings back the nostalgia of adolescence, of the time when we read the book.
On the other hand, the film has serious flaws:
1. Duration: 1h35 minutes is very little time to tell the story of a 330-page book; The consequence of this is that the story is rushed and worse, poorly told (Alberto and Natália's relationship becomes absurd, it comes out of absolute nothing);
2. Time and space: what was the objective of the film to take place in the year 2000 and not in 2008 as in the book? This change didn't add anything, on the contrary: at the end of the film, when Fani is going to the plane, a TAP Airbus appears in the background, but TAP only started operating in Belo Horizonte in 2008 (precisely at the time when the film should have been set). Much worse than the issue of time is this issue of space, since until Paula Pimenta appears in the film, it is simply impossible to feel that the story takes place in Belo Horizonte, as there are a total of zero Minas Gerais accents in the cast, but there are a legion of Rio accents and some São Paulo accents. Why doesn't the story take place in Rio or São Paulo? The story taking place in BH was implausible;
3. Still on the issue of time: if the film takes place in 2000, what was the point of using Perfect (Ed Sheeran, 2017) as the soundtrack? Wasn't there some beautiful, romantic music in keeping with the time in which the film takes place?
4. Inácio is completely ignored, he is not even credited at the end of the film (in addition, the actor who plays Inácio seems to be younger than the actor who plays Alberto, when it should be the opposite);
5. The pauses that occur in the scenes to show what Fani is thinking are a excessive/unnecessary most of the time.
Overall, the film is worth it for the comedy and nostalgia, but it could be much better if the errors mentioned above had not happened.