The JVC - HAN 250 headphones is decent at best. The headphones does a good job at canceling low fequency noise, such as from airplanes. However the headphones fail to cover my ear, and after a few hours of wearing the headphones, they begin to hurt my ears. If the headphones were to encase my ear, this review might be a different story. The sound quality is excellent. I can hear both low frequencies to high frequencies. This function of the headphones work with or without the battery. Replacing the battery can be a little challenging, as one has to pry open the the headphone. A simple AA battery powers the noisecanceling function of the headset for many hours. The case is sturdy and large, but not bulky. It can carry an iPod, an extra battery, and other miscellaneous small item. The price on these headphones were a bargain compared to the those made by Bose. I paid about a third of the cost for these JVC headphones that the price of Bose's, and in hindsight would had rather saved my money for Bose's noise canceling headphones.
Palo Alto, CA