What I found, in the platinum stones, was a richness and "filled in" quality to the bass, aside from what has been called a "technicolor" midrange. I don't find that in my system, which tends to be lean. It looked like the "writing was on the wall" with mulveling 's original post. I have two stones and will use them, face the question of replacing the diamond and getting them refurbished when I have to.
End of an era. I know there are other flavors but these meshed beautifully with my system and gave it a verisimilitude it lacked.