I saw Signs this weekend and loved it. I'd even see it again.
Shyamalan pays close attention to detail in this flick featuring Mel Gibson as a former pastor who is questioning his faith under the threat of an alien invasion. The children are very believable as is Gibson, and it is easy to associate with them throughout the film. In comparison to Shyamalan's previous popular works, I feel this film is much more like The Sixth Sense than it is Unbreakable. I was disappointed after seeing the latter, however this film more than makes up for it. There is some breathtaking camera work as well as a tight storyline and a great ending. I found myself mesmerized throughout the film. I have seen quite a few movies lately and the audience has been rude and annoying at all of them, talking, answering cell phones, etc. This is the first film I've seen in a while where the audience was actually stunned into silence, awaiting the next development, unable to turn their attention away.
Signs plays on fears we all have in order to create a story that is very believable as well as entertaining. I highly recommend it. I give it an A.