Back when I had more dollars than sense I bought one (GAS). At the time I did not notice much improvement in tone. HOWEVER, due to Covid I have been woodshedding a lot and as a result I am gaining some improvement in many areas. Back to Silverstein: I recently took it out of the drawer and used it on my Theo Wanne DATTA 9 which has been my go to for around a year. (I was using the RICO H ligature knockoff prior). I noticed a marked improvement in the clarity of the tone. I was quite surprised so I put the RICO back on and the difference was noticable to me throughout the range including up to altissimo C-4. My horn is a series IV King Silversonic (400xxx) and I am playing a Fibracell 2 1/2. Of course as always YMMV, but this was my experience.