Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great if you like infomercials....

This book has some interesting superficial information about certain skin problems, but every time she suggests products for an affliction, she lists only her own product line, with the occasional prescription product thrown in. (Oddly enough, she often finds her own concoctions better, stronger, or less damaging [pick your adjective] than the prescription products--and forget any of those worthless skincare products you can pick up in department stores.) If you're just learning about different skin conditions, this book may be mildly helpful; but if you're a long-term acne sufferer, or fighter of wrinkles, you've most likely heard all this information from the plethora of skincare commercials already out there.The next time I buy a book about dermatology, I'm going to look for an author who doesn't have his/her own skincare line to plug.