I have used one for almost a year now. On some cables like Valhalla it is imperative that it be used. I can never get it to sound right without using the Cooker. Some cables need as little as a day. Some like Valhalla I actually cook 5-7 days. In addition to interconnects and speaker cables it will also cook power cables. We do not sell these devices and I have nothing to gain in this post other than sharing my experience. Hope this helps