This movie reminded me a little too much of "What Lies Beneath," and the very very ending is incredibly stupid, but other than that, it's really not bad. The ghostly images that flash across the screen are cool and creepy, and I liked the plot. Even though I knew that there was going to be a twist (you can't fool me, I know when you're hiding something from me, movie) I was still impressed with how they pulled it off.
I actually can't say anything more without giving away the plot, so I'll shut up now. Check this one out.