Aside from a modestly effective twist near the end of the movie regarding the real identity of the child "Adam," this was a bland movie pretty much the whole way through. "Adam" applies to two characters, actually. The first being the child killed in a car accident near the beginning of the movie, and the second being his "replacement." After the first Adam's death, his parents are approached by a famous doctor (played by Robert De Niro in one of his more forgettable performances) who offers to use the knowledge that he's gained through laboratory experiments to clone Adam. The result is pretty much what you'd expect in this kind of movie. The new Adam seems to have memories of his previous life and seems from the beginning just a little "off." You realize that there's more going on here than meets the eye - the figure of Zachary (the boy in Adam's dreams) really doesn't seem to connect with the story, but to me the disconnect was so great that I settled for remaining confused rather than even trying to connect Zachary with anything. The movie tries to frighten with assorted chills, but never really succeeds in that regard. The twist (as I mentioned above) is modestly effective (I hadn't seen it coming) but everything that came before was so bland that I really didn't care by the time the twist came out. The ending was too open ended - there were at least two possibilities left open for continuing the story in a sequel that just seemed too wide open. Fortunately, the sequel never came. I'd have appreciated a bit more closure to this.
This is a mediocre movie at best. I always give a bit of extra credit for a twist that catches me off guard, but it's still mediocre.