For context, my system consists of an Ayre pre and amp, Gumby DAC, Aerial speaks, Audirvana +. The Blue connects a BPT power center to the wall that runs the electronics.
I would characterize the Red's improvements as giving the sound a vast increase in dynamics, a tangible increase in base definition and an extension of the upper regions. I am pulled into the music more and voices create goose bumps where there were none. It sounded so much better I wondered how one cord of a half dozen in the system could do this!!
Break-in in my system was different than often reported here. At first, everything sounded confused and muddled, but, at the same time, I also heard immediate improvements in dynamics. At 8 hours confusion waned, and vanished at 20. At 40 hours, it all sounded really good--clear and immediate and tangible--only to improve in these specific aspects at hour 60. I began to think that the flaws I heard--such as a need for tighter bass control that had improved, too--were not due to the Blue but to the other cords/equipment.
I try to keep price out of qualitative judgements but then, it is darned attractive and can't be ignored Regarding Bob's service that has gotten a lot of ink here: At 12.38 PM CDT today I emailed Bob to ask which cord should be next. At 4.09 PM, he said Red (for the DAC). Service response time rating? Same day response has to be considered premier league.
Can't wait for Red.