Sony RDR-HX900 DVD Recorder with 160 GB Hard Disk Recorder
TV Guide On Screen dosen't work
I had and returned this unit. It's possible it was a fluke with just one specific unit, but TV Guide On Screen didn't work reliably for me.  About 20% of the time it wouldn't record a show I asked for, or would attempt to record shows I never requested (often instead of shows I HAD requested). <br /> <br />Also, the interface for TV Guide On Screen is very clunky.  The parts of the interface designed by Sony look and work fine, but the TV Guide interface for scheduling recordings or looking at guide data doesn't mesh with the rest of the interface, and is unintuitive. <br /> <br />Technically this unit doesn't run 24/7 like Tivo or Replay units, but it might as well.  It seemed to turn itself on 4 times a day for 3 hour stretches in order to receive the guide data. <br /> <br />The actual image quality of this unit is excellent.  I found the second to lowest quality to be acceptable for the majority of my shows. (The equivalent of 4 hours per disc.) <br /> <br />Because of the flaky TV Guide On Screen system, I'd really recommend looking instead at a Tivo-based DVD unit like those from Toshiba, or a regular Tivo box, or Sony's cheaper DVD-only GX-300.