Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not the best

This book has always been regarded as the 'bible' of echocardiography. I disagree. Although it is very comprehensive, I have found a few errors (either in formulas or diagrams) throughout the book. This is very disturbing as it should not happen in a book as highly regarded as this. For someone who is learning echocardiography, this book is not written in a way easiest to understand. Often, description are complex and bit around the bush. I had to re-write some parts to make it easier to comprehend. Coupled with the errors found, I have wasted considerable amount of time to make the best of this book. An echocardiography expert could have easily pointed out the errors. For a learner, when the formulas/diagram don't match or make sense, one often spend hours trying to work out why, look up in google etc, only to find that it is an error in the book.