the connect point where the hook go into the headphone be loose , so they do not stay in place very well . the sound quality be ok , but because it wont clamp onto the ear well enough I lose a lot of sound definition which make it sound pretty crappy overall . my primary problem with headphone be the cord that connect to the mp3 player stop work because it rip at the base of the plug . I buy these about 3 month ago and the where the cord connect to the metal plug have completely come undo . I think it may be because I wrap my headphone around my mp3 player before I put it in my pocket . but nonetheless , this cord do not last near as long as some of the cheaper headphone I have purchase .