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: Amazing, but really hard!
Product review: I received this item on time. It's a really hard workout! I only did it for two weeks because I'm a full-time student and I didn't have enough time to rest and study. See your doctor before doing this workout, it's extremely hard!
