Anyone who sees the trailer or advertisements probably expects a typical horror film. After all a disfigured Frank Langella showing up at your doorstep is right out of the Stephen King playbook.
But what we are seeing is a horror style beginning morphing into sci-fi about midway through the movie. If you don't like sci-fi you shouldn't see the movie.
The fact is as sci-fi flicks go this wasn't too bad. It was original and contained some nasty little twists and surprises to keep us interested.
Yes it went a little slow but that was more than compensated for by the good cast including creepy Frank, always watchable Cameron and some welcome chemistry between Diaz/Mardsen that went a long way.