Sony RDRVX515 DVD Recorder
Poor design, failed drive.
The DVD drive on my unit failed within three months. It was always a pain to use anyway.  Sony telephone cutomer service was annoying in the lengthy extent of questioning to determine if it really failed or was it my disks.  The customer service rep. seemed very reluctant to offer warranty service.  I had to pay for shipping to Laredo Texas for repair of their failed product. One happy customer tell someone, but an unhappy customer tells many.