Hello Agisthos,
Here is a person talking to you who really tried it out. I tell you how I bought it. A friend of mine camed to my place with a hijiri nagomi powercord. It was better than all my powercords so I decided to buy four of them from the same shop for my setup. When I got them I was really sad because they doesnt come close to the soundquality of my friends nagomi... :( I called the shop and told the shopowner that the cables maybe are fake! He promised me that they are for sure NO fake because he bought it from the distributor for germany. Then for my luck he remembered that he burnt my friends cable in for two days with a hagerman labs frycorder 2. Then he sended me his frycorder to burn then in by myself. And in the end it was the same soundquality. No it was even better because I burned one cable in for two weeks. This was the bestsounding cable. Then I wanted to buy the frycorder from the shop but he told me he won't sell it because its his own exemplar. Then I ordered one from haglabs webpage. Since then all my powercords have minimum of two weeks burn in and the frycorder works all the day. When I don't listen to a unit of my setup the powercord sticks in the frycorder. ;) Now I am interested in the snakeoil and electricitystudent comments from people which never try - just pray their useless non-fact-based opinion. :) Sorry for my bad english but I am from Bavaria/Germany.
Kind regards from lake Tegernsee, Andreas