I too have purchased the Dekoni Limited Stellia sheepskin pads. I agree with most of the post above in regards to the tonality change with these pads.
I'll start with saying that these pads should have been the pads that came with the OG Clear! Of course made by Focal themselves.
To note also, I've never heard any harshness from the Clear with the stock pads, or any pads I've rolled.
What these pads deliver is amazing. Especially for vocals. The transition throughout the midrange to the furthest treble registries is magical. The sense of realism is unbelievable. It's the most balanced I've head to date with the Clears.
Add in the sub bass extension , cleaner imaging, and prat. It's a huge win by Dekoni with these pads.
Now where I differ with the post above is the soundstage. I feel the sound has expanded in depth and height. Width seems the same. Imaging is much more holographic and life like. It's engulfing. When I switch back to the stock pads the whole stage shifts forward taking away that behind the head extension and nuance. Things I hear in the music with the Dekoni Stellia pads are not in the same place as the stock. Stuff behind the head shifts more to the side of the head taking away that 3D feel. With that said I can see some feeling the stage is more intimate with the Dekoni beings the width is more emphasized with stock but it sounds less layered and more on a 2D plane left and right.
To wrap it up. These pads for me are it! I purchased a second pair to keep in the drawer should something fail with my first pair. I can't recommend these pads enough for the OG Clear. Tonality is spot on and the increase in the realism factor, vocal presence, 3D imaging, and sub bass extension is amazing.
With anything sound. This is just another subjective opinion by another user on an audio forum. You may hear it differently.