You are considering whether to buy a product. You look at the reviews. Would the following review decrease or increase the chances of you buying the product?
Review title: If I could I would give it a zero
Product review: I found this book extremely depressing, and I don't think that anybody but a sick, morbid, depressed person would find it a good book. You can read it if you want, but I bet you'll find it as good as I did. (It's quite possibly the worst book I've ever read, and I've read a lot of bad books.)
