Well, this is my first review in MAL. The first thing I'd like to say is that, in my opinion, this movie should be watched after you've finished the anime. Although it's a prequel, many characters from the middle-end series appear, and some spoiler events, shown in the main series as "flashbacks" are described better here in the movie. If you watch it first, will lose some expectation and surprises of some key events. The second thing is, I'm sorry if my english is not the better one out there, because its not my first language. I wanted to write a review because although I loved theanime, I took too long to watch the movie because I thought it was about Hibito and Mutta's childhood, but it's not. It shows Mutta in his previous work, dealing with his own problems in the car company as an engineer and designer, and Hibito following many training and exercises, that for the ones who watched the anime, will certainly remember. There is no explanation of many of those training in the movie, because if you already watched the anime you will understand them.

The movie follows the same animation as the anime, with the same music. It looks like a big episode, that finishes in the first episode of the series.

So, for me, it is worth to watch it if you already watched the anime and liked it.