Hmmm. Really interesting movie. Maybe, anyway. It's rare for me to walk away from a film and not know what I thought about it. I definitely can say this, however. I thoroughly enjoyed the film while watching it. It's classified as a "thriller" and I found that it was written well enough to keep me from figuring out the next plot point too quickly. Even though it was fairly predictable, I found that I was only figuring things out as quickly as the main character was. So I haven't decided whether or not I like the overall writing. The rest of the movie, however, was great. Some of the camera work, lighting, sound, etc. could not have been better. And it's got a creepy (but appropriate) soundtrack. And as a bonus, I was happy to see that Apple's iBook and wireless networking was prominantly featured.
I doubt I'll go see it in the theater again, but I'm really looking forward to renting it when it's released on DVD so I can take a more detailed look at the film. I suspect that some potentially interesting scenes were left on the cutting room floor. Some of the scenes in the trailer, for example, didn't make it into the final cut.
Anyway, it's an interesting movie. I think I recommend it, but ask me again in a few days to make sure.