Instruct: Classify a given Amazon review as either positive or negative.
Query: Hissing Head Squisher

These headphones are uncomfortable to me, they are sprung too tightly, with no adjustment. The noise cancelling does appear to work, but I wanted to use them to attenuate the noise from adjoining cubicle dwellers. It does this effectively if you turn up the volume, but so do regular ear-bud headphones. The hiss with the noise cancelling turned on is not something that you could stand without some high volume music to go along with it. I haven't taken a plane ride with them, so I'm not sure how they would fare in that application. Also, it uses 1 AA battery, not 2 AAA.