Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Better to call 6 sigma academy and ask for their brochure

I bought this book considering the hype around this subject. What I got in return was nothing more than a superficial overview of the subject with no depth. It was like reading a product brochure difference being you are paying for it. There were no insights on methodology nor fundamentals. There are better ways to spend your money like keeping lights ON.