The movie had a decent budget, and the actors were actually professional, but the backstory for the whole movie was terrible. The writers apparently had three conflicting ideas for the "why" of the haunted house.
First: in the opening credits we see a slow panning scene of a medical office. Then we see that a man is being murdered by a woman in a white dress. The man appears to have been preforming some kind of medical experiments on a girl, from whom he has removed something and left her dead. The camera then pans across a row of dead girls laying on the floor, the woman in whites hand reaching in to close their still open eyes. The credits scene ends with the woman in white having hung herself with the girls laying on the floor, the girl who was cut open still on the table, and the man slumped over in the background.
Second: A short "campfire" version, and then a longer version of a different story. The woman's husband built the mansion for her, and then they had 12 children. She was pregnant with the 13th, and something went wrong, and she died in childbirth (or he flat out murdered her) he went crazy and killed the other kids. Then cleaned them all up, and arranged them in the nursery as if she was telling a story. The police took pictures of this crime scene and have no idea how they died.
Third: The mother (the woman in white) possesses one of the boys, and then acts insane as she says that the main character is the Father and he tried to leave them, but she wouldn't let him.
So...which is it? Mad scientist who murdered his family preforming sick experiments? A father who went mad with grief and killed his family? Or an insane mother who killed them all to keep the family she loved together?
Then there are the ghosts. A tall gaunt man with a slashed throat, walking around glaring at the boys. Obviously not the father as the main character is supposed to be his reincarnation, and not the doctor from the opening credits since he was played by a different actor, and killed with a hammer. This man is also shown to be helping the mother carry the children in another scene. There is no mention of butlers or secret lovers or any other explanation for who he is supposed to be. In the opening credits all the children are girls, they have their eyes, and their mouths are stitch free. The child ghosts for the rest of the movie are a mix of boys and girls with no eyes, and sewn closed mouths.
The opening credits were the best part of this movie, telling the story of the house and setting a horrifying backstory in place to build on. The second story we are told has nothing to do with the opening credits, and I don't care if they didn't have CSI at the time, you can tell if someone has hanged themselves pretty easily from the wounds on the neck. Trust me I have actually written papers on this very thing! Also the woman from the opening credits wasn't pregnant, while the stories version was.
It's obvious that this movie was made by people who had a bunch of creepy, scary story ideas, but no clue how to stitch them together to properly make a good story. In conclusion, a decent budget, professional actors, terrible writing.