Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not bad but a bit over priced

I've used it on several flights now. It does not completely block out all noise but it does an adqueate job so that I can listen to my Ipod without going deaf during a flight and it allows me to snooze during a flight. I recommend the bigger orgiinal quietcomfort because, it uses 1 AAA battery. I rather carry a AAA battery on a flight rather than a bulky recharger which is what's required for the smaller quietcomfort 2. The headphones are not adequate for vacuuming or for mowing the lawn; it doesn't block out enough noise for those uses.