Summary: I've just purchased my third set of these headphones in 18 months. The biggest downside to these headphones is that the cord is quite thin and tends to break, as has happened twice. To be fair, I'm only replacing my latest set because my cat chomped through the cord(keep away from pets!), hardly Sony's fault. As a commuter in London, I use these headphones in some crowded conditions, so actually I think they've stood up well.
Summary: Bulky keyring unit but very, very convenient and completely eliminates all those irritating tangled-up wires when you drag your MP3 player out of your kit-bag or the vulnerability of winding flimsy cables around your MP3 player. In no illusions that it will last forever as the wires are quite thin to allow it all to wrap up tightly but the holder itself is rubberized and the carabiner isn't going anywhere.
Summary: I bought these headphones 2 years ago from a shop in New York and was very pleased with the quality of the sound, design and comfort.Unfortunately due to a fragile cord they stopped working 2 years later, but still I think they were a good buy. You can't beat the comfort of having the cord easily adjusted and neatly packed with just a press of a button.
Excerpt: This review is about Sony’s earphone MDR-KX70LWW The Manufacturer Sony was founded by Akio Morita and Masaru Ibuka in 1946. They were always designing and manufacturing new electronics. One of their first innovations was the automatic rice cooker that was successful. Morita and Ibuka earned a living by repairing radios and manufacturing voltmeters. They were originally called Tokyo Tsushin Kogyo, which is interpreted as Tokyo Telecommunication Engineering Company.
Pros: neat and tidy with good sound production
Cons: the retractor can sometimes be annoyingly in the way
Summary: I find the sound quality to be excellent. The format (keyring) is very handy and the retractable wire is very useful - preveting the usual tangle. The only downside - alas most other earphones are the same - is the weakness of the connection that plugs into the MP3. it seems to be not very sturdy and eventually there is a break somewhere on one of the wires. This happens even if you are careful. A more sturdy connector or perhaps a loop system would solve this.