Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Not very helpful
Review: This book has decent information for novice photographers who would like to work exclusively with Kodak film and chemistry, but it is of little use to someone who simply wants to take better pictures or who does not have access to a well-outfitted darkroom. All in all, if you want to be a professional photographer, your money is better spent on other books, or even a class.
