Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: "Essential" stories, flawed format.

The format of the Essential series is softcover, black and white (many times muddy), printed on cheap, pulpy paper. The classic stories in these books deserve better treatment by Marvel. Do yourself a favor and instead buy the Marvel Masterworks series, which are hardbacks, printed in color, on high quality paper. They are worth the difference in price.