My first TiVo HD turns 2 years old soon, and it has been working fine on the pair of S Cablecards.
Occasionally, it will lose its mind, but I just call the cable company and tell the automated voice attendant to send a reset signal to my cable boxes and I'm back in business. I've only had to do this twice....was neat the first time I discovered and did it. I opted to get lifetime service finally for it. Meanwhile, my second TiVo HD which I acquired 4 months after the first....also has a pair of S Cards...got Lifetime service just recently, due to the timing of when it renewed (it had only been only month-to-month service). My 3rd box (of only a few months) has an M Card. Which is only being tested in my area, so I didn't convert the older boxes to M Cards. The rental is $1.99 per card (M or S). So far no problems with it. L
