Art should be its own hammer.
2 very big thumbs up from a 5 1/2 year old and an almost 41 year old.
the only concern I had going in was the music. looking at the soundtrack, it seemed like hipster vanity, but it really worked. the music was grand and sweeping and slightly dark, but maintained a large feeling of what it's like to bit a kid who's slightly lost in his own head. just like the book and movie.