upon first impression , I be so happy with these headphone . they look great , feel great , and , for the first few day , work great . even block out all of the obnoxious noise on a airplane and throught the busy street of Chicago ! however , within the week of have they , the right ear go out , which REALLY disappoint I . and then , I go to try and call monster , as the instruction that come in the pack say to do for warranty reason , and they line be down - but only do they tell I this after keep I on hold for thirty minute . finally I be able to exchange they out for a new pair . I be weary , but they be work alright upon first test they out . that be , until a day later , when I be just sit at work , listen to pandora , nothing too loud , not move like I be at the gym or anything , and the left earbud go out . really ?! so I be return they for my money back for good now . if they would last , then I would have give these a 5 star review . but alas , that be not the case ... one two pair . odds be against ya , beat .