I saw Vacancy at the cinema and was so impressed I bought the bluray. The story is very simple - lone couple in a hotel have to fight for their lives as a pack of snuff film-makers try to murder them to continue their sick business. The plot is very concise - we are given some brief back story about the couple (their marriage is breaking down due to bickering after they lost their child), and the atmosphere is masterfully built through the introduction of the creepy hotel manager. After that, its pretty much all action and no exposition. It brings to mind the horror/slasher movies of the '70s, such as Texas Chainsaw Massacre, where the action is entirely the focus. Like those films, the movie ends at daylight, and there is no mention of what happened next. If you approach this as the B-Movie it is, you will enjoy it. Luke Wilson and Kate Beckinsale are forgettable in the lead roles - indeed, I think it would have benefitted from using unknowns. The hotel manager however is brilliantly malevolent and well acted.
I should mention that the bluray of this doesn't offer a particularly exceptional picture - if you have a decent upscaling DVD player you are probably better off getting the DVD and saving yourself a few quid. For some reason some movies (e.g. Casino Royale, Dark Knight) look truly exceptional in HD, whereas others look only marginally better than their standard def counterparts. In some cases, bluray can even have a detrimental effect, leading to juddering etc. That's not the case here, but I did not feel that the picture quality of this movie was a particularly shining example of the capabilities of bluray.