As a huge horror movie fan, I couldn't wait to see THE DEVIL INSIDE
The first half was intriguing, mainly because of the argument: are people possessed by demons or merely psychotic? The scene in the hospital room chilled me to the bone. Whoever played the possessed mother deserves an Oscar nod simply for "acting" like some my patients.
As for the rest of the movie...well, this sums it up:
The original EXORCIST is still a thousand times better. Lame ending, too. Wait for cable.