If the Shunyata Black Mamba is snake oil, then put me down for 55 gallons!

A buddy just purchased 2 Black Mamba's one is a 20 and the other one was a 15 amp. He offered them to me for 24 hrs, before they became a permanent fixture in his system. I installed one on my Audio Prism power conditioner and the other on my Pass XA-25. It turned Saturday from a work day to a listening day, Wow! Sound stage, air, more defined bass. Anybody else have that experience with Shunyata power cords?