Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Impressive but I prefer Bose

The noise cancellation quality, comfort, design are all excellent and a substantial savings compared to the Bose NC headphones. I really enjoyed using Audio-Technica ATHANC7 Noise-canceling Headphones. With the introduction of a new version of Bose headphones I decided to order a pair (QuietComfort 15 Acoustic Noise Cancelling headphones)to run my own side by side test. My conclusion after repeated trials I found the Bose were somewhat superior in the noise cancellation ability and creating an even more quieter experience. However, the Bose are more expensive. The testing environment was an office cubicle with a large air condition unit approximately 4 feet away.