It was okay. Wasn't really very scary, but maybe I've just become numb to all these horror movies.
The movie doesn't show thing chronologically, which, while wasn't confusing, does leave one wondering on the timeframe of when everything occurred. The only thing we know for sure is that the original incident at the house happened three years prior to the main story of the movie, and that the professor hurled himself off his balcony the day after the original incident.
When did the Williams family move in to the house? The hauntings had obviously been happening since the day of the original incident, and it seems like the Williams must have moved in and lived there for a while...
Who taped the cabinet shut, and for what purpose? Whoever did it must have seen something, and felt compelled to do so... but it seems like no one in the Williams household would have had the time to do so.