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: This product is fantastic. Great quality and easy installation with the included video. It was installed within 15 minutes on my 2012 Chevrolet HHR. I have already recommended this to friends who are looking for a replacement mirror, as well as, some extra help installing it. One suggestion before attempting this, watch a few videos online about how it looks in comparison with your existing mirror. The mirrors will be off much more than they had appeared prior to install.

A: Good Review
****
Q: I got this book as a gift and was very excited to open up the package. Unfortunately, it's a total disappointment. The author obviously did not do any research on her topic of time travel (which seems so simple in theory and makes it sound like science). She used some words that made no sense, such as:&#34;In fact, my mind is working at warp speed because I'm doing some intense thinking right now.

A: Bad review
****
Q: I love the look of this set, which is why I've bought it twice. However, after about 9 months or so, something started scratching off on every corner and piece that was supposed to be painted over. I'm using these knives now for cutting chicken, etc., but can't imagine how they'd perform in a formal situation. It appears that you cannot remove all layers -- only the paint over each layer, though none have flaked off, so I'll keep them.

A:
Good Review
****