Definitely the best anime I've seen so far along with Cowboy Bebop and Death Note. It was fun, exciting, witty, incredibly artistic and heartwarming. It leaves you with an honest teaching about life, in particular for young adults.
The musical score is perfect; I am crazy about the opening song by Asian Kung-Fu Generation, A Lost Dog and Beats of the Rain.
The concept and story are developed perfectly, the length of the series is just right, the structure and…