Utterly ordinary cinematically, but an interesting exercise in adaptation: the author of the source material wrote a screenplay which changes even the personality of most characters, not to mention some of the deaths, all the while creating a new ending, preventing it from being predictable for those who have read the book.
Accomplished for using its silly killer-plant concept and playing it straight, and even making the horror uncomfortable and gut-wrenching. The setup is simple and the plot is non-complicated, giving it a straightforward story that may not be classically suspenseful, but it's still affecting. The characters are also likeable, if realistically flawed. One of the better Hollywoodized horror films of the 00's decade.
The only original thing about this generic horror film is the fact that the monster picking off the usual cast of nubile teenagers are some ridiculous carnivorous vines - other than that, this is a bland and predictable paint-by-numbers gorefest. Basically 90 minutes of filthy young stars crying, even the graphic gore scenes fail to generate any tension or suspense.