Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Lightweight

The author's credentials are impressive. But his advice is familiar and light on details, although he tries to make up for it with interesting stories.His credentials? He's an advertising pitchman who has met Steve Jobs in a boardroom and has horror, and success, stories to tell about pitches with a number of major brands. His street cred is impressive.But his advice is lightweight. Much of this you've heard before. The stuff that's new - his inside secrets - he presents casually and without much detail. For instance, how do you structure a presentation as a story? He uses a careless example that barely looks like a story, then is quickly onto his next point. Very disappointing.The overall impression I have is that this book is not intended to share any of his secrets, but merely to be a 188 page brochure for his consulting services. Are there a few useful nuggets? Yes, there are. Are his stories entertaining? Absolutely. But he keeps his best secrets to himself.