my wife had already bought the predecessor series of in-ear headphones from Sony and I was so excited that I had only used her, which of course led to internal tensions technical relationship :-)) So I bought and which and was not disappointed. Super clear sound, sometimes lacking a little bass, but it was enough to get the ear at full volume to harm (which I had never made completely out loud that keeps so no one out). Super I also found the included essays in various sizes. For each ear, the right size. One just needs to try at the beginning a little rum. Above all one notices only after prolonged wear, whether the size really fits. What I can not understand the gripes of some Rezesenten obviously compare a small in-ear headphones with large, over and above the ear professional headphones. If times on the carpet and look at the mini things. What is there to get out? THX Dolby Digital sound? But not really. Those looking for good headphones, which are in the middle price segment, which is the right place. For iPod / iPhone or the like that is exactly right. But who thinks he can thus hide the environment, devote himself completely to the sounds and to pay attention to every little musical nuance, which should make even thoughts which headphones he really needs to.