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 Are Shakti Stones effective?

About as effective as Shun Mook Pucks, Geoff Kiat’s Pebbles (, $150 Boutique Fuses, HFT’s and a host of other snake oil products, that convince the gullible to hand over their cash.

Cheers George
Did I already say they are as good as a phone book? Why yes, I did.
They do look better than a phone book, which is the performance level they are competitive at.

You guys crack me up 🤗
I knew a guy that covered the whole internal wall surface of his house with copper sheet as he was paranoid about microwaves- not an audiophile but quite a good bass player...