While the movie starts of strong, it takes very weird turns that seem to follow each other way too fast. The end result just looses credibility: [spoiler]1. How the mother doesn't know her child has a disease when she wants custody. 2. Gloria has to stay with her dad, or with her mom, but there seems to be no middle ground. 3. How it ends with both parents being there for Gloria on vacation, while after this turn of events, they probably can't stand each other anymore. [/spoiler]
The actors all play their roles marvelously: Omar Sy comes of as a super charming guy, with an enormous amount of optimism, Antoine Bertrand's gay stereotyping is also great and very funny.
But even though the cast is so great, the script is just lacking. That's something the acting can't change.
All in all it's not a bad movie, but it's not up to standards with what I was expecting.