I must say that I do not just Bypass careful with the cable. I use it to play the entire room and balcony plant to my music. Because I carry the laptop a lot around the house, or on my MP3 player change if I otherwise do not need the laptop, it has been unplugged already frequently turning. The MP3 player I wear often around only to the cable with me, several times was the cable already wedged somewhere and was then accidentally pulled out of the device, and so far there are no problems. Would be about 9 months old.
To transfer I can not say much, but I personally noticed no loss of quality. Critical is with such a long cable mainly Einstreeung by mobile / wireless, etc. The well-known call / SMS noise though sometimes lands in my speakers, but only if the phone is closer than 20cm to the cable. Where the most then, of course near the plug, so I can not say exactly how it behaves in the remaining cable and whether the Einstreeung not possibly happen before the cable. Sure I can in any case say that there was never really problems.
For me, this product is ideal, although I do not rule out that you get a similar quality for less money after good looking. In most cases I would recommend anyway a cheaper alternative for a permanent connection. If you put the cable, however, often look around, this is I think the right thing.