Toshiba D-R4 Multi-Drive DVD Recorder
Just not worth the stress
I bought this unit a week ago.  The first disk finalized perfectly.  After that it has taken between 10 and 18 times to finalize a disk and several of those times are after it erases all the chapter titles and thumbnails.  I'm going to try calling Toshiba tomorrow but after looking at reviews on several sources this appears to be very common with this DVD recorder and I expect it will be going back Monday.