I replaced BDR Cones under my rack with Pods. The improvement was easy to see. Not hear, see! My rack is 750lbs solid concrete and granite. Even so when I would walk up my weight would make it rock. On Cones it would rock very fast and a small amount that was hard to see. But my tone arm uses a weight on the end of fishing line for side bias. The weight swinging back and forth was a dead giveaway that the rack had moved.
Now on Pods it is a lot easier to see the rack sway. I'm sure it swings more now than before. But, and this is the important part, at a much lower frequency. Well below anything that matters. This is easy to see as the side bias weight almost never swings at all. So even though the whole rack moves it is moving way down below 4Hz - probably more like 1 or 2 Hz- which might as well be motionless. It is really mind blowing the way this huge massive rack can move so smooth and slow from even the slightest touch. Even the gentle pressure of putting the cue lever down will move it. I can also touch gently with a finger and stop it. Crazy!