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.

[EX Q]: i dont think its working i saw nothing no changes while using this.maybe im expecting too much.ill give some more time then i'll try anything else. oh well live n learn.
[EX A]: Bad review

[EX Q]: I had been planning a trip to the Galapagos Islands, and this guide was required reading by the tour group guide. The guide is thorough, providing information of interest and useful for all travelers traveling among islands, but the format of this book severely detracts from any pleasure of seeing them. There's an interactive CD-ROM provided which allows you to see photos that were previously in the book, but not the whole trip. Additionally, there are many grammatical or spelling errors.
[EX A]: Bad review

[EX Q]: I purchased this book to help me get back into reading for a while. I'm glad others had different experiences than me, but from what I've read on Amazon, there are just too many mistakes in the text. You have to believe that they spell all of their words correctly, sometimes it's hard to tell. In addition, at times when I see errors, I wish he clarified whether or not you can make them yourself if you're unable to find another speller. He doesn't even list it anywhere. My advice, don't buy it.
[EX A]:
Bad review