The story is a but rundown, it isn't the first of its kind plot wise, there have been a handful of other animes with similar themes but the execution was very crisp and well-done.
The art is very modern, but not edgy like most anime tries to be nowadays, with sharp angles and character design, making it look too futuristic, but rather a bit down to earth and plain, yet drawn with quality.
The music is very memorable, i've listened to the main theme atleast a dozen times, its just that catchy and fun.
Character development was neither deep nor shallow, everything had good pacing. I was actually surprised how much they managed to squeeze into less than two hours worth.
Enjoyed the show a lot, everything just clicks and made it a great movie to watch.
Overall even tho the story wasn't original, i still rate it at a 10 because its been a while since i've seen a movie, that Ghibli studio didn't put to shame.