Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Mumbled solutions....

The book presents a few scenarios (though not enough) for self rescue but ultimately the author produces such complicated and mumbled solutions that understanding the diagrams is work. Most of the solutions could be presented in a simpler way, with less backups, less fuss whitch is usually the way emergency situations require you to act. Also very common devices such as the croll, tibloc and other vertical devices are not at all mentioned. I think this could be better.