I say "issues" because although the 2 or 3 copies I've tried aren't complete coasters, they're not working well, either.
I'm copying a DVD that I created in Adobe Encore. The Encore burned DVD-R (both Prodisc F01 and Mitsubishi MCC type 002) plays in my 3 computers and a set-top box w/o any problems. The disc is pretty full: 4.31 GB. It's my content, none of it is protected or copyrighted.
When I copy it with D2D, it copies successfully, i.e., no errors in log. When I play it, several of the video files don't play: the player indicates that it has "stopped" and upon pressing the top menu button, focus returns to the first playing menu.
I'm using a NEC 2500a (firmware 1.07 - the latest) in a machine with XP SP1. Nero is a demo copy (I'm evaluating whether I'm going to buy it).
Since there are no errors, I'm not sure where to begin diagnostics. I'm a newbie to DVD burning. BTW, I've also tried making copies on another system, with a Samsung DVD writer (don't recall the model), but given that things have worked with Adobe Encore on this system, I'm assuming that burning copies should be straightforward.