I have a Philips standalone, but the idea is the same. Yes it will work in the sense that you treat it the same way you would a VCR that was capturing your ReplayTV content. If your input has Macrovision on it (i.e. you played a DVD into your ReplayTV in the hopes of then recording it out) I'd lay odds that the output from the ReplayTV would still have the Macrovision in it, so your DVD recorder would not record it. There are ways around that involving third-party tools, but I leave that as an exercise to the reader.
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Daniel
Forgot to mention, there are probably several quality levels you can record to DVD...my Philips offers 1 hour, 2 hour, 2.5 hour, 3 hour, 4 hour, and 6 hour. I find anything over 2.5 hour ends up being too blocky and artifacty for most shows recorded at Medium (i.e. I almost always use 2 if I'm dealing with hour long shows so i can fit 2 on a disk, 2.5 for half hour so I can fit 5)
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Daniel
Forgot to mention, there are probably several quality levels you can record to DVD...my Philips offers 1 hour, 2 hour, 2.5 hour, 3 hour, 4 hour, and 6 hour. I find anything over 2.5 hour ends up being too blocky and artifacty for most shows recorded at Medium (i.e. I almost always use 2 if I'm dealing with hour long shows so i can fit 2 on a disk, 2.5 for half hour so I can fit 5)