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.

Didn't work. Tried it with 3 different phones and same result. The mic worked only when held in front from ear canal, that's not how they were advertised.
Bad review

This book is a collection of two books, so you basically get the first half for free and have to buy the second one because they are not in order. This makes me quite angry. It should be stated immediately that this isn't just an inconvenience. For example, if I want to know some information about how to implement data encryption with Mailvelope, I'll look it up online using [...] first, then try again by finding the URL with mailvelope.com/learn? And that's it.
Bad review

This is a good product. It arrived in excellent condition and it was exactly what I needed. It's just the right length for my needs.
Good Review