Own trailer review 3: Haunting in Connecticut (2009)

 What happened in the trailer? 
A family moves into a new house in Connecticut and find that there is a locked room in the basement. Strange artifacts are found under the floors, and visions of ghosts are seen by various family members. The happenings get worse and the priest crashes, whilst seances are taking place at a table.
Which positive, clever or interesting aspects do you think you could include in your own trailer? What generic features are fulfilled well?
I think that the film uses collision cutting to create jumps at suitable intervals. The shots are edited together so that they tell the story as best as possible. There is also an extreme use of collision cutting used at the end, where there is a fast montage of shots, an inter-title, then a very slow shot with a very loud sound. I aim to create a memorable ending in my trailer using collision cutting.
Which aspects of the trailer did you think were unsuccessful? And what would put off it's target audience?
I thought that possibly the trailer tells too much of the narrative, and doesn't really leave anything to the imagination. I think that it would appeal to its target audience, but is maybe cloudy as to exactly what sort of horror this is.