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.

The book was easy to read, and filled with valuable information that is worth the time spent reading it. I bought it in conjunction with a project, and, as part of it, read this very good guide on how exactly they did things down there at Area 52. Not only does he get his information, but writes it in such an entertaining way, even for non-scientists.
Good Review

I'm not sure if the product is as good or worse than a lot of others. I did get this free with an order so I have no complaints. It's kind of weird though. The package doesn't say who makes it and there are no reviews anywhere. If you look at some other stuff like this, it's usually either on Amazon selling for $30-50 depending on how old they are. I will keep taking it. Like most things, when results do come, I'll update this. For now...three stars.
Good Review

Not only the battery that comes with it sucks.. It didn't last very long. I charged for like 8 hours and still took about 2 hrs. to get my laptop fully charged. Don't waste your money.. Save it! :(

Bad review