The Denon AKDL1 is absolutely the best CAT5 cable I have ever used, bar none. Since it's an audio cable (NB: it's not for computers!!!), I plugged it into my voice over IP phone and now the voice quality is incredibly clear!! No more dropouts, echos, or any other audio quality problems. I couldn't believe a cable could make so much difference, so I connected a cable tester to it and saw that it rendered the 0s and 1s perfectly. I'm even getting some 2s and 3s!!! None of my other ethernet cables have ever done that. I only wish this cable would come in 15,000m lengths so I could connect my VoIP phone directly to my office for faster speeds (I speak very quickly, so I need the extra throughput). However, at the current cost per cm, that would run about $5 million. I'm not sure I could afford that even though I'm sure the voice quality would be awesome.