GoVideo DVR4000 DVD-VCR Combo
Works great; no problems
Just to offset some of the criticism here...  I have owned a DVR4000 for a month now and have had no trouble at all.  It's very convenient having both DVD and VCR in one box.  And it was trivial to install -- I just unplugged my old VCR and connected the DVR4000 in exactly the same way.  I didn't even change the cables.