Are you using the gray or the black soft landing pads (SLPs)? Are they seated properly? (I have not tried these yet; I have only tried O-rings, but I just received some SLPs in both gray and black to try out).
I am using the soft black landing pads. I made sure each pad would sit as well as it could under the cap. On the SP modifiers, the base of the stem doesn't allow the pad to sit at the bottom of the cap so it doesn't work well on modifiers from what I can tell.
On your A-Z keys, because the height of the caps vary throughout each row, the result of the key press varies because some are closer to bottoming out than others. Without the pads, each key press will bottom out exactly the same. This changes when you modify the travel distance with the pads.
I appreciate the attempt for making a product that will quiet down the switches down, but for $18, I wouldn't buy them again.