You Should Have Left could refer to several things here. It could refer to Theo Conroy, the protagonist of this spooky little flick, who really should have left his first wife before things ended especially badly. It could also refer to Susanna, his new wife and Hollywood actress, who probably should have left their current marriage before starting an affair. Most clearly, it refers to the sort of Amityville-esque "GET OUT" foreshadowing these characters should have heeded before deciding to live in a rural vacation home in Wales that happens to be very haunted. Finally, it acts as a clear warning to us, its audience, that unless we are just looking for some mindless entertainment, we'd do better elsewhere.
In its defense, haunted house movies are awfully difficult, especially if you want to do something new and interesting with one. This tries neither, and rests happily on the premises of other, well, premises. Though this particular house is no Overlook Hotel, the story is only a shy replication of The Shining while the characteristics of the abode behave similarly to that iconic building. Easily the most interesting thing in this movie, the house is not the sort of pastoral cottage you might envision in Wales; its cold, modern architecture marries cool tan wood and sharp gray stone for a severe, notably not-Gothic atmosphere that even throws a few glimpses of pastel coloring in for good measure. It's quite pleasant to view, and most of the film takes place during the day, lulling us into a sense of warmth and safety.
But the house seems to be conscious. Though the haunting initially manifests as shadows that move around on their own, they quickly suggest a more psychologically-driven basis. Doorways appear in one shot but are gone in the next; characters measure internal spaces that are larger than the external structure allows; the shifting layout lengthens staircases and hallways or adds hidden spaces that cannot architecturally fit. And then, of course, there's the mysterious caretaker named Stetler who never seems to be present but is often around, and might be taking candid Polaroid photos of the new tenants. These elements, like those of the Overlook, suggest that the scariest hauntings aren't necessarily vengeful spirits to be placated a la Ghost Whisperer but are in fact places where bad things have happened, the knowledge of which torments and twists the minds of those caught within its walls.
And it's fair to say that, despite the less-than-original plot and themes, the performances of its small cast also help the movie. Kevin Bacon plays Theo, the much-older husband and father figure, who seems about as tightly wound mentally as he is physically. I mean, honestly, the man is gorgeous, and the salt-and-pepper thing he's got with his facial hair is hard to ignore. While he's no Jack Torrance, he is a writer suffering block; he is the older, jealous husband of a young woman; he is the father of a child who learns secrets about their family. Amanda Seyfried plays Susanna with surprising restraint, and her coy, seductive demeanor belies a strikingly acute awareness for the fractures in their otherwise happy relationship. Seemingly-happy, rather, as we learn. The filmmakers clearly understand these characters well, and as the house haunts them, we also become haunted. Neither we nor these characters are ever fully aware of what's real, what's warped or exaggerated, or what's fake.
The biggest problem for me, here, is that writer/director David Koepp has done this kind of thing before, much more effectively and beautifully. In Secret Window, he magnificently pulls off the kind of home-invasion psychological thriller that could easily translate to a haunted house, one in which fabulously inventive character drama married genuine terror on screen. Literary and witty, that film fully fleshed out its own complexity and managed to make perfect sense the whole time. Conversely, this new flick rarely makes sense, twists and turns often not because of character development but for the sole purpose of audience manipulation, and ends with a bizarre attempt at catharsis that answered few of the questions I still had. And its laughably bizarre quasi-religious explanation neither fits nor sits here. Not that horror should always explain itself, mind, but it should at least be interesting -- and consistent -- enough to allow for theoretical discussion afterward.