Any Audioquest Firebird powercord or Silver Cloud users?

As the title suggested... I am looking for opinions on these special Audioquest powercords... (so not the Firebird speakercables!)
The Firebird Source, the Firebird High Current and the Silver Cloud... anyone owns them, or tested them against others? What is your opinion? they seem to be much less welknown then the other cables of the Audioquest Storm and Wind range of powercables... Which triggers my interest as they both use a mix of copper and silver.