Are Shakti Stones effective?


I have never used Shakti Stones and wonder if they really work and, if so, what do they do,  I have used the Shakti Holographs and found them to magically focus the sound and tighten the soundstage. From what I have heard, even from Shakti, is that the stones make a significant difference is some usage and less in other. Has anyone used these and what do they do?
mglik
I had them for years, used them in different systems and NEVER noticed any difference when they were applied on different components of each setup. I finally sold them a few months ago. 
These stones work best on a Cd player that uses only green magic marker on the edges of the CD's.  However, they are good for throwing at Barry Manalow CD's and LP's.
Post removed