Summary: the sound quality of this headset is really amazing. i got them with my xperia Ray. believe me, the SOUND QUALITY is really AMAZING. . when i bought xperia Acro S, and got MH-650c in-ear-canal headset which disappointed me alot, the plastic nods are worst, even the sound quality is worst for the headset which comes with premium sets like Xperia Acro S/Ion. .