Very funny, clever and brutal in equal measures. The comedy doesn't fizzle out like most horror comedies part way through. And watch out for Dexter Fletcher's awesome cameo.
Still got it after all these years. Not a single note of incidental music throughout the whole film but despite (or possibly because) of this it has some very tense moments. It also has some Hitchcockian shots, which is ironic as evidently Hitchcock saw this and was inspired to make Psycho.