Kind of weaksauce. The ghost body-jumping is pretty arbitrary and doesn't make much sense when there's multiples of the same entity running around. And where was the security guard during the entirety of the climax? Considering he conveniently showed up every other time someone even thought of going into the asylum, with his golf cart parked just out front he managed to be MIA until the very last seconds of the movie proper. Did the actor walk off the set or..?
Perhaps even worse than the plot holes, it constantly teases with opportunities for gore and T&A, then blue balls the audience. What a waste of an R rating.