I have a Replay TV (very much like TiVo) and I LOVE IT.
I reacted the same was as Eclipse... I couldn't understand what possible use this would be, but I'm converted. We rarely watch anything when it's on anymore, and it's so nice to skip all the commercials. Plus, we can save important episodes of shows so that we can say "But didn't Character X say the exact opposite 2 episodes ago?"

Now FH wants to buy one for the bedroom, so that we can go to bed halfway through a show and finish it in the bedroom, but he hasn't sold me on that idea quite yet. I'm afraid we'll never leave bed on the weekends (not that that would be Soooo horrible )