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: Ok if you didn't know anything prior about this topic.
Example Output: Bad review

Example Input: This unit was shipped promptly & as described by seller.
Example Output: Good Review

Example Input: I recently had the privilege of seeing John Lennon perform in concert at The O2 Arena and this CD was released before that. The show itself wasn't that good but with Paul McCartney playing so well, it makes up for it a little. It does sound very 'beatles' like which is interesting as their album didn't sound that great from start to finish, not sure if it's just me or not.
Example Output:
Bad review