If you don't have the CableCARDs like us during initial setup, you will have to re-run guided setup to add the CableCARDs.

ENGADGET: Review: Series3 TiVo HD

Guided setup was pretty easy, but the time estimate was way off, maybe this is because we used the Ethernet port instead of the phone line.

ENGADGET: Review: Series3 TiVo HD