The Beats Studio noise-cancelling headphones not only sound great, but look magnificent. The noise-cancelation technology is superb and is ideal for long plane rides, road trips, or just relaxing and listening to your favorite songs. These DJ quality headphones don't come without a few minor drawbacks though. For one, the paint finish on these headphones is prone to scuffing and scratching, and two, probably the biggest problem with these headphones is that they require batteries. Unlike other Beats Headphones, the Studios do in fact require batteries to operate. This can be a problem for avid music listeners as the batteries are only triple As and wear down quite fast. If you're a DJ these headphones may seem appealing because of the wonderful sound quality, but they aren't for you. Using these headphones for more than three hours straight will drain the battery so low that sound quality will start to deteriorate. At five hours of use the headphones are liable to not function at all. These headphones are perfect for the casual music listener with pure sound quality and great noise-cancelling technology. They can connect to any device with an aux. jack available. The plush leather ear cups on the headphones are extremely comfortable and stylish. In short the Studios are not recommended for the avid music listener. They are perfect for the casual music listener and provide style, comfort, and sound quality in one, beautiful package. They are prone to scuffing, so handle with caution. Sound Quality Noise-cancellation works great, and the sound is of the purest quality. Comfort The plush ear cups provide extreme comfort for your ears. Design The requirement of two triple A batteries limits the headphone's functionality. Avid music listeners would find that they would have to replace the batteries quite often. Durability Very durable. Made from strong and lightweight materials. Prone to some scuffing and scratching. Paint shows fingerprints, so a good cleaning from the microfiber wipe included is a necessity.