Maus II details Vladek Spiegelman's experience as an inmate at Auschwitz. It examines both the historical events that Vladek survived as well as his relationship with his son in the present day. The story is moving and the art is interesting - the anthropomorphic mice/cats/pigs idea allows for a certain emotional distance that human characters do not (though I've heard some criticism about Spiegelman's choice to use pigs). Vladek is a well-rounded character very reminiscent of some of the aging folks in my family; the strained relationship between Mala and Vladek hits close to home for me for the same reason. His experiences in WWII are well-told - graphic enough to get across the atrocities he survived but not so grotesque that readers are frightened off. Reading this after Survival in Auschwitz offered a great basis for comparison between Vladek's experiences and Primo Levi's. I can't help but wonder if they ever ran into each other. 
 Downsides: the anthropomorphic animals act like people, not animals (for example, I was expecting the Nazi cats to literally sniff out the mice - not so), rendering the usage of animals moot. A few of the transitions between present and past felt a little forced and rushed, but overall, I enjoyed this series as a good mix between the horror of the Holocaust and the humor of Art and Vladek's relationship.