I also got one last week, had pretty much decided on the D-R400, and needed to get it last week to make some DVDS before the weekend. Pretty sure I got one of the first batches that CC had, and I had a $75 GC so it made it nice and cheap
Very easy to set up, I just ran svideo from my Comcast 3416 DVR to the svideo input on the back. As has been discussed, the box doesnt' output 16:9 anamorphic, but it does output 16:9, and I'd rather have 16:9 widescreen that doesn't quite fill up my widescreen TV upon playback than be stuck with cropped 4:3.
In the setup menus there is an option for picture format, you can force 4:3 or 16:9 or set it to "auto" which is what I left it on. It detected and recorded downconverted HD programs played back from my DVR just fine, in 16:9 format.
Recording looks great for SD, when I used SP(2hr) It was pretty easy to figure out how to edit the title names, neat that you can do that. There are some trade-offs with certain format discs, like for -R's you can record widescreen, but you cannot manually create chapter marks(you can set them to appear every 5,10,15,20,25,30 minutes though). For +R's you cannot record 16:9 format, but you can insert chapter marks manually wherever you want.
I was surprised just how VCR like it is, it records right away when you hit record, and stops right away. You can pause the recording and then resume, this works great for editing out commercials without creating seperate titles on the DVD.
Paired with a DVR this thing is a great way to archive, although only in SD. I have the HTPC for HD
If you have a DVR, save the money and get this tunerless model. Record to the DVR with a few button presses, then just record to a DVD using this device when you get around to it, then delete off your DVD. This way you can edit out commercials easily.
My project this summer is to convert many VHS tapes. 2hr college bball games work great on SP mode, when you edit out commercials, 2hrs is plenty of time, and you have some time to record postgame recaps or Sportscenter highlights of the game or something.
I have not tried the upconverting yet, needed to get another HDMI cable(yay Monoprice!) It's just hooked up via component for now.
If anybody needs/wants to know anything more just ask, I'll try to start checking this thread/area in my daily perusing of AVS