I was very pleased with these headphones. Supplied with 3 interchangeable tips, and deliver good sound quality. But still, after 6 months of normal use, the left atrium no longer works. Too bad. Fortunately, being still under warranty, the Sony reimbursed me if I buy another brand of product. Thing I'll do, I think. But if it is to start the operation again in six months ... I do not blame especially Sony, I also had headphones to a competitor who made five months ... I think it is because they are in-ear, less strong, probably.