I wonder if they're worth much, both given DirecTV's moves away from TiVo and toward HD (and MPEG4). I'm modestly annoyed that my Series-2 HD-TiVo (HD10-250) is effectively obsolete. On the other hand, I'm enjoying my Series 3 HD-TiVo, which happily connects to my home network and lets me extract shows, etc.
What annoys me now, of course, is that Comcast is a pretty lame provider. I was thinking that I'd now be immune to bad weather. Indeed, the quality of my video doesn't correlate much with the weather, but it's still quite variable, only now it's variable for no good reason.
I tell 'ya, it's really tempting to cut the cord and become a Netflix family. Really, really tempting.