I had my Verizon cable card install today in my TivoHD. After having spoken with Verizon reps for weeks and being told that there were no M-cards available from Verizon, I was shocked when the installer showed up with an M-card. He told me that he thought I'd rather have it than two S-cards. The install went pretty smoothly and there was no problem with pixelation. I'm keeping my fingers crossed that it continues to work well.