This is a whole some movie .. it beautifully portrays the experiences of Chidhood, sense and search for belonging, Freedom, dreams, Connection and Friendship.
Thise who are criticizing this for lack of storyline and being slow and boring, i feel sorry for you that you forgot to realize the concept of life and living altogether.
Life is much more than just plot, the real life lies in between beyond those dramatic, eventful incidents which are mere flagpoles along the journey, the actual living encompasses those monents of emotions, feelings, and thoughts and experiences that we might have forgotten growing up but they make us who we are today!
The biased and diregard for such is no different than people's disregard for people with "ordinary" lives. Thats where the problesms of lack of empathy, sympathy arise.
If you care for any depth then you'll realize the beauty of this movie. A must watch!