High School of the Dead: Source of Entertainment or Attraction of mindless anime zombies?

For some time, I've been told, “You've got to watch High School of the Dead! It's so awesome!” And “Man, High School of the Dead was kick ass tonight!” and I've even heard, “High School of the Dead is a action filled anime that's intelligent!” And after watching the entire series, my response is: What show was I watching?

Warning: Possible Spoilers