I'll be interested in your comments. I've got a couple of TWL power cords, and find them to be difference makers.
I tried several power cords over the past couple years and heard no difference on my Oppo 105, Rowland Consummate line/phono, or AtmaSphere M60 amps. Since then, moving to new ICs, relocating my electronics from between the speakers, running a dedicated 20A line, and replacing the Oppo with a new DAC have greatly increased the resolution of my system, so I figure it is time to try PCs out again. Ralph Karsten, the designer/manufacturer of my amps, claims improvements with better PCs on the amps, but I didn't hear anything when I tried it before, so we'll see.
I'll let you know my findings.
AC