Despite the "Then" recap featuring only myth-arc moments, this episode is more of the monster-of-the-week type. Not that there is anything wrong with that, but the "Then" recap is a bit misleading. And even though the more standalone episodes can be just as excellent as the myth-arc ones, they usually are of lower quality. Not necessarily bad, just not great either. In this case, we have a good, solid episode, with some nice twists.
Except for the final scene, there are no real great character moments for the Winchesters and there really aren't any groundbreaking plot ideas (there are, after all, several nods to Wes Craven's The People Under the Stairs), but the script does play with the viewers expectations. Then again, without that it would be just a stereotypical 5/10, wouldn't it? Minus points come from one character who is an example of the Too Stupid to Live trope, and some clichéd twists among the genuinely surprising ones. Plus points, in addition to the above-mentioned ones, from effectively spooky mood throughout, Dean's usual witty dialog, and Mandy Playdon's truly scary performance. However, among the first one hundred or so episodes, this just doesn't measure up against the stand-out ones, but is a 7/10 instead.