As you all know sony is mostly known for its sound quality.i am using this for last 6 months.sound quality is pretty good even you can hear the 3D sound effects clearly.like most headphones, one side wont stop working.but I am giving this a 4 star rating because you wont feel comfortable carrying it outside, as it is huge.in my opinion, you should go for in the headphone cu mp3 player beacuse you will feel more comfortable