Instruct: Classify Amazon reviews into positive or negative sentiment
Query: If you fly with a laptop, this is a MUST!

I was looking for a less expensive option than a $300 Active Noice Cancelling set. This works perfectly. Previously using a decent plain open air set, I could not hear the words on DVD's while on a plane unless I pushed the set hard against my ears. With these, I don't have that problem anymore. They are not designed to eliminate ALL background noise, so don't expect them to do that. I'd say about half the noise level of not wearing them, but that is all I need to be able to hear words clearly on DVD. On one flight when I sat in the back of the plane (right next to the engines), I left them on (but not plugged in to anything) just for the noise reduction.The hiss everyone is talking about is minimal, and the background noise is significantly eliminated vs. not using these headphones.