I am an esoteric tweak skeptic, as some here would likely attest to, I recently bought a Pangea AC14SE, to replace a fraying old power cord for my DAC, new for less than $100 and I have been very happy with it. It does seem to have lower noise and distortion as advertised and is built like a tank to-boot. See my system description for more details if interested.
Just last week I added another for the DAC in my second system with seemingly similar results I would say.
Tweaks that help keep power clean seldom have a downside, just a matter of how much up case by case. Digital related noise in particular is a problem worth addressing. Pangea does it quite clearly and effectively I would say.
Would like to try the ac9SE for my power amps someday, but feeling no real need quite yet.