One of the things that stands out about Romero's zombie films, is that they're not really about the zombies. There's always something else being commented on. Where the classic “Dawn of the Dead” was a biting commentary on American consumerism, “Land of the Dead” bites in hard as an allegory (emphasis on gory) of the Bush Administration.
All of the extras from the directors cut DVD are included, the only downside of this Blu Ray is that two of the featurettes from the DVD version can't be watched as stand alone extras any more. Instead, they've been cut up & sprinkled throughout the film as a picture in picture track as an attempt to give the illusion of blu ray exclusive features.
Romero is at his best when working in the genre that he invented, and while not up to Dawn or Day of the Dead, this is still a solid entry to the Dead series, with great picture & sound quality to boot.