First off, this is not a slasher movie. It's not even a horror movie.
As another review mentioned, this is more of a stage play featuring a single location and only two major characters.
I'm having a hard time judging this movie as I feel it is a bit unfair seeing as it was mismarketed and it isn't the filmmakers fault. That being said, it is NOT a good movie even for what it is trying to be.
The two leads are irritating, the soundtrack is very annoying, especially the stupid duet that plays over the credits. There are multiple plot lines that go nowhere.
In short, those watching for something akin to the cover will be upset, and those wanting a lifetime style thriller won't watch because of it (nor is it even worth it).