I bought these in April after an extensive search for great sounding headphones. I used Sennheiser at my workplace, so I was eager to get these phones. The sound has been great, and they made my commute much nicer as l listened to my music on the bus. However, I noticed that the plastic coating the wire was no longer attached at the jack. I tried to remedy this with electric tape, and this worked fine... until today. When I pressed play on my ipod, I was devastated to only hear sound from the right phone.I love the Sennheiser's sound quality, however, these are not the most durable headphones. I used them everyday and I am not sure what would cause the coating to detach from the jack. Needless to say, I am very disappointed.