As with all the great supernatural films of this genre, the horror doesn't exist as an entity outside of its human characters, but as a metaphorical way in to a deeper understanding of them. (reverseshot.org)
We're entering weird territory here where people are going to begin assuming any slightly supernatural film from Bad Robot is a Cloverfield sequel. (slashfilm.com)
Shyamalan understands too well his own formula and with Signs, his third overtly supernatural film after The Sixth Sense and Unbreakable, he displays an unbecoming self - consciousness that renders his ostensible subject allegorical subtext, with his own favourite issues (the father / son dynamic, the comic book spirituality) the only reason for the film's existence. (filmfreakcentral.net)