These are Excellent Headphones.I read how people say they don't sound good. If your looking for Studio Quality, don't buy these,that's not what they are. These are Bone Conduction. They Vibrate through your Bone and you can hear them just fine,they are not Intended to go in your Ear and Not intended to sound Excellent, you're just supposed to be able to hear them, and you can just fine.They are Supposed to sit just forward of your ear on your Cheek Bone with slight pressure so you hear them with out havingthem Directly in your ear. You hear everything while still hearing your surroundings.The Bad Reviews sound like people who try to put them in their ears rather than wear them like they're supposed to,And really don't understand how to use them.Phone calls sound Great and everyone can hear me just fine.And they Last All Day, I put them on in The morning and forget I even have them on, and, take them off at night.They have NEVER went Dead on me, EVER.When using the In-Ear phones, I kept pushing wear Wax back into my Ear where you can't get to it. Had to have my Doctor clean them out.With these,you can take a walk, and still Hear everything Around you, while listening, as long as you don't Crank it up too Loud.These work Great as their Intended purpose, and I would definitely buy them again.