There seems to be some confusion over the concept of "helpful."
You may have noticed that Amazon provides a nifty little button with every review for every Amazon product. It is a "helpful" button. At the end of every review, the reader is asked: "Was this review helpful to you?"
I must stress: This does not mean "Do you like this review?" It means exactly what it says: "Was this review HELPFUL to you?"
Actual definition of helpful: adj. providing assistance; useful*
If a review helps you decide the product is something you'd like, it is a helpful review. If a review helps you decide the product really isn't for you, it is a helpful review. If the review leaves you more confused than before you read it, it is NOT a helpful review. If the review gives away key plot points in a book or movie, it is NOT a helpful review.
And believe it or not, sometimes a review is neither helpful nor unhelpful.