I admit, I wasn't looking forward to this, but it wasn't that bad... However, I'm not planning to read it again anytime soon. I was also glad it wasn't super violent as I was bracing myself for. 
 I think Derf's art stylization really works with the story in an unsettling type of way --because it is an unsettling type of story. Part of me thinks that Derf is trying to absolve himself of some guilt he may have about not doing anything --never saying anything to authority figures or teachers ... 
 He says in the intro that perhaps Dahmer could have gone down a different path with the intervention of the adults in his life. However, I agree that in the end, Dahmer himself is responsible for his actions. 
 I was also really impressed with the notes and bibliography Backderf includes at the end. These aren't just his recollections --he did a lot of research to create this graphic novel.