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.

The book started off interesting but soon went down hill from there. I found myself skipping ahead a hundred pages at time, just to get it over with. It was like this throughout the entire book. The main character, Matt, is supposed to be an author and his "successful" friend takes him on in their quest for some sort of literary success.
Bad review