I could not name what I didn't like about this graphic novel in the first reading, done in 2009. In the second reading, I have discovered that it is the culmination if the plot, its inelegant intelligence, that negates all the excellent atmosphere built up. 
 Still, certain storytelling techniques here are mindblowing, utilising the unique opportunities provided by the comic medium. I think it totally deserves its status as a seminal work; and I am not sure if anything much better than this was achieved in the world of graphic novels.