Personally I thought it was really lame. Half the film was just pictures of the house with the ghosts flashing in and out with a soundtrack of "creepy" voices. it was like: "oh shit, the ghost is right by her! (stobe flash) oh wait its gone! (stobe flash w/ voice sound effect) oh shit, it's back!!"
plus i thought the plot was pretty weak. as were the characters. i just didn't find them believable, and i found myself wshing they would all die (except for the chick who should make out with me).
although if you're in to shallow horror movies, go see it.