I use My TiVO Series 3 records the amazing new series on Fox / National Geographic: "COSMOS: A Space-time Odyssey" ans archive them so my niece can see it. She's in a remote area of the world, with no access to TV or even the Internet. But I can send her a DVD with the QuickTime movie files on it so she can see it that way. That's why I convert TiVo to mov files.
I'm simply editing in the QuickTime Player 7 itself; don't need anything fancy. Just editing out the ads. The fact that I could do this! I tried products from iSkySoft, and they didn't work. The open-source cTivo (Google Project) KIND of works, but doesn't give me much control over the final .mov file. Roxio Toast 11 can do it ... but limits you to 640 x 480 with no support for HD. Pavtube HD Video Converter for Mac is the ONLY product I can find on the Mac that works correctly and easily with native TIVO files!
Below is a step-to-step guide to convert TiVo to QuickTime movie files for creating DVD.