Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cisco needs to put this book in every router box!

This book saved me a router upgrade. My company was set to replace our existing routers until I found this book and went thru its contents. While it discussed some obvious things, it also alerted me to a series of techniques which I put to use. Other than some obscure Cisco documents this is the only text that covers router performance and its cost was literally worth its weight in gold. Now if only my cheap company will give me a bonus.. but thats another story.