Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Pretty Disappointing
Review: This book had a couple of interesting suggestions, but it's mostly fluff. It would make a good magazine article-and, in fact, I realized after buying it that the author has some articles on the same subject available online. I wouldn't recommend spending any money on it, but if you receive a free copy, it's worth skimming. Or, better yet, just do an online search for the same topic and you'll find the few interesting tidbits in some articles.
