A great example of the (then nascent) slash horrors which became ubiquitous in the years following this film's release. I have seen it three times now, and have always been impressed by its atmosphere and its virtually unique way of providing the shocks, seemingly knitting them from the film's sometime meandering pace. The acting isn't exactly earth-shattering, but neither is it dreadful. Enough chemistry seems to exist to bear the film along to its fraught, violent climax, which is as tense and chilling as the film's bulk. The film's low budget is not at all obvious - the lighthouse illuminating the distant fog is a simple, cheap and yet beautiful shot, and the film makes the most of its location with similar great shooting throughout. Visually it may have aged, but the story has not. Good film.