I've had my HD TiVo for a few months. The unit has been working fine up until about a week ago. Then, it started freezing on both recorded programs (even ones from a month ago), newly recorded and live TV. The TiVo menus and navigation also became unresponsive. Reboots did not resolve or improve the problem. Called DTV, they told me to do a delete and reset. From what I read here I figured this would be the death of the unit as the disk was probably failing. Did as they insisted. The screen came up saying the operation would take about an hour. 30 hours later... no dice. Still on that screen. Called DTV back. The had me unplug it. Started booting then came back to the "clear and delete will take an hour" screen. DTV says it's toast and are shipping me a replacement. So, add another to the list.