Yeah,this movie isn't something special.The acting is not very good,the plot either.But for a true horror fan,that some times doesn't matter.The ghost of the mother is scary as hell!If you watch the movie late at night and don't care much about the acting or etc. of the movie then it should be very terrifying!
If you want to be scared watch the movie but don't expect a masterpiece.If you want to see a masterpiece don't watch the movie.It's very simple.But remember:you only watch horror films during night.
So in conclusion:If you like scary horror movies watch this late at night and you will be satisfy.If you don't like these film and you expect something like a plot ,good acting or something like that-skip that one!