Animation is top tier
Fights between anyone who isn't singular slap sir are well choreographed
Characters are entertaining and more so for their interactions
Biggest weakness of the show is an intentional one, there isn't any tension since nothing can hurt him and one hit KO. animepill.com/one-punch-man-episode-1 One of, if not the best as of time of writing fight scenes if in the first epsiode
it's a Hero comedy that makes fun of all the fighter anime, main character is the caped baldy, who trained every day for 3 years and then found out anyone he fought died in a single punch hence the name of the show
imo it's a good show unless you're looking for something serious