Misunderstood, if slightly flawed, gem.
The title of this film is a major play in it's all too often seen criticism I'd say; it is very far removed from 'Cannibal Holocaust' or 'Canibal Ferox' - indeed the actual cannibalism itself is quite toned down (unlike in the other namesakes).
The film, rather than being an exploitation romp in the jungle, is set in Atlanta and bears similarity with David Cronenberg's 'Shivers', Romero's 'The Crazies' and obviously 'Dawn of the Dead'. The similarity is a far more low key - rationalized - horror. Some may find the film boring, but this to me is bleakness, and there is a strong difference.
The flaws are seen very early on - the obvious stock footage of Vietnam and the same usual poor dubbing, but place these to one side and you have a great little film. Do not expect another cannibal gore fest, and any David Cronenberg fan would appreciate this... rather like 'Rabid' in more than one way.