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.

I purchased the book in hopes to find out some information on my dog's behavior. Unfortunately, the method mentioned by the author was not helpful unless you were a total novice at training your dog. The tone of her writing is very condescending-it sounded like she had just gotten out of an English class and couldn't get beyond that first "lesson." Some readers may find this helpful... but for us, we found it offensive.
Bad review