It's not an ending for the series, is only another special, i'm disappointed about that.
The story of the chapter and the philosohpy is not bad at all, but some previous chapters were a lot better and more emotional.
The characters that appears (aside Ginko) are not so charimastic as others from previous episodes and don't transmit so much than others. I liked the fact that in this film Ginko looked more worried about the other character than in previous chapters.
The art is amazing as always, with beautiful nature landscapes such as forests and mountains. The animation is very colorful and fluent.
The seiyuus made a great work, giving a lot of personality to the characters. The OST as always in Mushishi fits perfectly with the natural and psychological atmosphere with very beautiful tracks.
Even it's length is not very thought-provoking. The 46 minutes of length goes pretty quick.