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: A disjointed and disappointing effort.
Product review: I found Keegan's "History of Warfare" largely disappointing. Although the author succeeds in bringing many facets of ancient and modern warfare to light he fails to provide a common thread. This lack of theme becomes more telling as the book continues. This is particularly disappointing in view of his outstanding earlier works, particularly "The Face of Battle".
