I had no problems with this line (although it seemed a bit thin) and it transferred sound cleanly and efficiently, but over time the 3.5mm end of the line started to "act up." The wires inside the insulation (the insulation was fine) started to pull apart apparently and it stopped transmitting sound correctly (static, cutting out totally, etc.).

So, I bought what appears to be a heavy-duty replacement with an "L" shaped 3.5mm end. I recommend getting an "L" shaped plug if you are connecting this to an MP3 player or laptop.