Instruct: Classify Amazon reviews into positive or negative sentiment
Query: fourth class information

This book has TWO sentences of helpful information. Stick to your brands and be polite. Hey, is that just one? Obvious and counter- productive advice like, it's easier to get a first class upgrade when you take a red eye flight, does not qualify for either luxury advice or travel. The only luxury in this book is the 242 pages used to say one useful sentence. It is regretable that such a dependable and interesting series as Traveler's Tales would publish such a useless book. I find the 5 star reviews also suspect. Not one reviewer mentions some new concrete advice that helps them now enjoy luxury travel.