While the headphones worked, I would give them a 5 star review all over, because the sound quality is incredibly good for the price, they sound more like £100 headphones, the quality is really great from bass to sparkly treble, obviously not on the level of the real high-end headphones such as klipsch x10, but these are a really great choice for most casual music listeners.
BUT
I had these for just over a month from Amazon, I adored them, then, they started making unusual noises and stopped working. The customer service at Amazon was exceptional, they sent out a replacement immediately.
THEN
I owned the second pair for just under a month, again they were great, and then the second pair stopped working completely again (the left ear went silent), so i had to send this pair back, (to which Amazon gave me a refund of the original price because they're brilliant at customer service)
So, although the sound of these headphones is fantastic, the build quality is pretty dire. the cable is VERY thin and could easily get damaged (and the cable is so thin that when it brushes against your coat or whatever it produces interference noises all the time), and the headphone body is plastic (fair enough) but not very solid and made out of multiple loose parts.
I have now decided to go for the Sennheiser IE7 earphones as they have similiar sound quality (well, slightly better) and a reinforced thick cable. They do cost £120 (double the price of the klipsch) but I want build quality as well as sound qualty this time, and it's worth the extra cost if they don't break...twice.
Hope this helps