I ordered a copy of the omnibus volume of Middleman comics in mid-July, and in a way I'm glad it didn't arrive until after ABC Family's Middleman finished its season. The comics are slightly different from the TV show. Darker maybe. The words are the same for the most part, but actually hearing actors deliver them gave me a better idea of the tone, or maybe gave a tone I preferred.
Also, the comics seem to spoil some big things about the show, but I suppose the show could always turn out differently. Its universe is already bigger.