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 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.
Bad review

This case is made of VERY cheap plastic. It broke while I was trying to get it on my ipod. The plastic breaks easily and can be taken off. DO NOT BUY!!!!!
Bad review

We thought it looked nice and we had a high foot board, but after only seven months of use the wood has splintered in several places, making us afraid to put anything on it. If you don't have people or family that are really big and weigh around 140 pounds then this bed would probably last for years. If your wife is small at 5 feet tall you're going to need a new mattress every 7 months.

Bad review