Just a heads up, but the story was really bad and confusing. Just because some of the people who contributed helped make Kimi no na wa doesn't mean it'll be good.
The art was alright, but Shaft's other works were better. You could say they wasted their talent on it.
No bad opinion on the sound, it wasn't bad.
The characters? Hated each and every one of them! They were all so annoying and bland, and they didn't even improve in the end.
Overall, it was a disappointment. I recommend you listen to the soundtrack online instead of watching this disaster.
