Given an English language product review, determine if it is a Good Review or a Bad Review. A good review is one where the product's review has positive tone and Bad review is one where the tone of product's review is negative.

For an "official authorization," this one is not very good. My college instructor required it for a research course, as did my fellow students and I who took it. There were errors in the book even before we had studied most of it; there was, for example, a question that stated "How many pieces can be shown to lie at an angle between 45 and 60?". Um, the only piece you have right angles 60 apart was supposed to look like half a square.
Bad review