One of the best Batman stories out there. Many comics try to string long stories along several issues, but tend to read awkwardly because of the monthly issue problem. The Long Halloween does not have that problem and it reads as if it were intended to be read in this form to begin with.
I will say that I was not always a big fan of the art. For instance, Catwoman hardly looked human sometimes, and even through her costume, her abs are extremely well-defined. Occasionally I would confuse some characters with others, but the overall atmosphere of the book worked with the story.