Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent book, with just one proviso

On reading quite a bit about this book online before ordering, I was convinced that All American Ads of the 50s so thoroughly matched my interests that it was going to be the last book I would have to buy for a while, and certainly the last book on this subject. --Wouldn't it be nice if life really WAS that simple? This book is the ultimate vault of old ad gold, and one is hesitant to criticize at all. But...The one thing about All American Ads that really bugs me is the big grainy blowups that fill too many spreads here. The full page ads are joys forever. But jumping back and forth between creamy, crisp, photographically reduced perfection of reproduction on one hand, and overextended, grainy enlargements of detail on the other makes for a somewhat disjoint experience.This one gripe aside, it is a book you absolutely MUST have if you care about old ads and old popular and sociopolitical culture.