One of the most touching movies I've seen

Rating: 10/10 (19 October 2015)

Spoiler alert: the next two paragraphs are spoiler-free, 3th one is not...
I know this movie has seen all possible reviews from 1 to 10. Some are disappointed because it is not Toy Story or other Pixar movie. Personally, I don't see why it makes sense to compare this with any other title! This movie is unique in the sense that it tries to explain the workings of the brain in an understandable way. And it's been a long time since a movie affected me like this one... Last ones where Dogville and Requiem for a Dream.
I have a 6 year old boy who is a fantastic kid but with some behavioral problems. I've shown him this movie so that he can understand his occasional anger and frustration attacks better. While I watched with him, I loved the way the deeds and interactions of the mind control task force is reflected in the real-world behavior of Riley.
But it got especially good when the plot shows that Sadness (shunned by all as a pertinent danger to the mental health of Riley) actually is just as necessary as her counter party, Joy. Sadness has always been shunned by the others sentiments but when she is given the lead the results is not at all as tragic as we would expect... And at that point the movie comes to an yin and yang conclusion: we need both extremes of everything as only one is never complete. And you need all spikes to have a wheel. I loved that... Therefore, I also disagree with many critics who claim that this movie is too dark. It seems dark at times but the overall message is not that.
Where I do agree with other commenters is on the point that this really calls for a part 2 about adolescent Riley and the new set of psychological challenges connected to that...