Instructions: 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.
Input: I could not get the thing to work with my Canon Rebel XSI or any of three lenses I've tried it with. It is probably fine for some cameras and lens combos, but it's useless when you can't get a good focus at infinity focus. Don't buy it. You will be disappointed.
Output:
Bad review