Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Maybe it's too essential

First I apologize for my English. As a Reference book it can be good, but I don't think this is a "gap-filling" reference, as someone say. The listing is complete, but the critique is too short; I expected much more. There are some mistakes in text and lack of data (for instance, where is the review of "Tokyo Decadence" ?)