After about a week living with the Brise Audio Shirogane attached to my Campfire Audio Trifecta, and running through some of my favorite music with it, I can confidently say that the buyer's remorse I worried about feeling is not coming, and will not ever show up. I'm delighted.
If I had to describe the difference between this cable and the previous cable (the stock Campfire Audio cable), it's like giving your car's windshield a good cleaning after a road trip. Where this analogy falls apart is on cost - it doesn't cost north of $2K to clean your car windows (typically).
I'm very, very pleased that I purchased these, and I'm such a fan of Brise Audio (this is my second cable after a Brise Akagane LE2 that I have on another set from Campfire) that I just ordered the Yatono Ultimate, and I have high hopes there too.
Very, very highly recommend.