I know this is an older thread but I feel compelled to share my thoughts about the Blue Dragon PCs. I bought a pair of them earlier this year. I gave them ~45 days or so of run in and they just never seemed to float my boat. I tried one on my DAC (PS Audio DS DAC at the time and Codex recently) and my Zidoo UHD3000 video/multi-channel music streamer. I even tried one for nearly a month on my Ayre KX-5 Twenty preamp. AT this time I did preamp and DAC and used another cable on the Zidoo. It just felt like something was 'off'. But being as this was over a period of about a month and a half, you kind of lose perspective (and time, apparently). Until you make a change. And I simply rotated in my existing cables which are Audio Sensibility Testament SEs. These are similarly priced PCs and also similar in construction (high purity OCC copper). When I turned everything back on with my AS cables inserted, I immediately said, wow! That's it. That's what was missing. The Blue Dragons are very dull, bloated and rolled off sounding. And the soundstage is more closed-in as a result. No clue why there is such a noticeable difference between these two cables.
Moon Audio are also very strict about their return policy. Hell, I never even asked for my money back. I offered to 'upgrade' to the Black Dragon if they would allow me to trade in my pair of Blue Dragons. It was a hard no despite my cables being perfect with all packaging. A policy is a policy, I guess. But it's not how I've run my business for 30+ years, so I don't fully understand the mentality. They could have kept me as a customer.
Anyway, I can't recommend this company's power cables. You can do far better for right around the same price. In fact, I have cables that are less expensive which don't ruin the sound like these did (AQ NRG-2s were $100/ea). I just wanted to try something new. Sometimes you win, sometimes you lose... Live and learn.