I'm tempted to make the change to the perforated ultra-white premium seats for my midnight silver Model S. I know that early on there was some concern about the durability of the perforated fabric and Elon Musk had tweeted that they were changing to a more reinforced backing material. Has this made a difference? Anyone seen more tears in the perforated fabric? How about the long-term stain-resistance? I have heard that the perforated ultra-white seats might have less stain resistance because the special coating applied does not adhere as securely to the perforated fabric compared to the solid ultra-white.