The best thing that one punch man can offer is its good productive values and that the main joke works, the first 2 times. But that joke repeats again and again for all the series, what makes it repetitive, the characters are simple parodies with their own joke that repeats again and again. Most of the music goes with the series, except for the ending, that is not bad but it doesn't fit with the series. The series has an spectacular animation, but the battle choreographs are not very good. This is a mediocre series with repetitive jokes that only work the first 2 times but with good productive values.Most of the characters are only there to try to kill the villain, are defeated, saitama arrives, kills the villain with one punch and everybody its surprised. The end.