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.

Example Input: I bought this product and the directions are vague at best. The pictures they show with it don't correspond to what it looks like when applied. Also, there is no mention of anything about bubbles that might get caught under it. Very frustrating. Would give zero stars if option here.
Example Output: Bad review

Example Input: This is one of the worst books I've ever looked at and read. It's just a waste of time. Save yourself 4 days with your friend (who isn't reading as well), read something, anything! You will actually learn more watching paint dry. In all seriousness.
Example Output: Bad review

Example 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.
Example Output:
Bad review