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.

Q: As time passed on, more facts came out that made the story much clearer.

A: Good Review
****
Q: This book was written in the 70's by a man who knows his stuff, which is a rare find nowadays. The problem with it is that he relies too much on anecdotal stories and anecdotical sources to support his hypothesis. It feels like reading someone's blog, not science. Also, some of the anecdotes don't make any sense unless you can explain away how they happened.

A: Good Review
****
Q: Although they claim to put out more volume, this headset is awful. The mic worked for about a month, then no more, and I'm not sure why. I was really disappointed because the price of these seemed great. I've had many Turtle Beach in similar style so it isn't me doing something wrong. Now it's too late to return them or exchange them, but still disappointed. Good luck trying to make calls with these.

A:
Bad review
****