After having read some of the negative reviews on the IMDb message board, I must say I was pleasantly surprised when I watched this movie. One of the great things about this was that it didn't immediately jump into the media's coverage of the terrorist plots in the post 9-11 world, but rather gives the viewer an insight into the mindset of the lead character (Peter Krause). This makes his obsessional behavior and the build-up of the paranoia he has against his neighbor very believable, because you start to understand that his dissatisfaction is caused by more just the 9-11 bombing. The actors were extremely convincing in their portrayal of these difficult characters. And although you might only sympathize with Khaled Abol Naga's character, you get a feeling of understanding for Peter Krause's character as well. All in all, an excellent and suspenseful thriller with surprising twists and great content.