Instruct: Classify Amazon reviews into positive or negative sentiment
Query: $80 USD for only 5 pages, can you believe ???

Especially, there is nothing in this book. We bought this book, because we are developing MMS plateform. It only suggest you what is MMS. Raise a $80 USD for 5 pages, It cheats us!!I never complain or asking for a refund, but this is my first time to email Amazon to handle this deceiving problem. However, Amazon didn't take care it. If they take a look inside this book, they will understand what I said is true, this book doesn't has anything valuable for $80 USD, and I am wondering they are using Amazon's website to deceive the customer for money.Anyway, NEVER consider to buy this book.