I owned one and sold it on ebay... It was an earlier model that used DVD-RAM media.. There were so many loops to hoop through that it just became tiresome.. What I wanted to do was record stuff off of my TIVO and onto DVD ram for archival, copy it over to the pc and then edit the commercials out before mastering onto cheaper dvd-r media. Capturing was easy - hit record.. Getting it onto the PC was a major b1tch.. First off, most dvd-rom drives do not support DVD-RAM.. I had to track one done that read them (made by toshiba).. Then the recorded video is not in standard mpeg2 or dvd format (with a \video_ts\ and ifo structure).. So I tracked down a converted that worked 85% of the time.. So then I could get to editing out the commercials.. I did it once and got so tired of the process that I just gave up.. I actually bought it hoping to transfer my sister's wedding onto DVD and then cleaning it up a bit (adding menus, etc.).. The recorder did not help and I should have just gotten a high quality capture card...
Things are easier now since most set top boxes record to DVD-r or dvd+r but I still think that they capture to proprietary formats..