Given the task definition and input, reply with output. 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.

This is a cheap knockoff - no doubt they made money. Please don't buy this product as I did in addition to the one that comes with kindle. It does nothing at all and only lights it up by going into sleep mode..its worse than useless... waste of money for sure!
Bad review