Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Hihgly Over-Rated !

I bought this book primarily because of the impressive reviews. After struggling with the book for months, I now feel that others' reviews of the book were too generous. First of all, the book needs to be better organized.And the codes need to be thoroughly tested.The content is lean, compared to the volume of the book. I tried several other PHP tutorial books, but I have not yet found one which met my expectations. This is just my two cents.