"I’m not sure how NEC does it, but whenever there’s a new DVD writing standard, it’s always an NEC drive that lands on my desk first. So, picking up where the very capable ND-2510A left off, is the ND-3500A. Now, the ND-2510A was the first dual layer compatible drive that I got my hands on, but other than that, the specs were pretty much identical to the older ND-2500A. The ND-3500A on the other hand, is a much more revolutionary device. Although I’ve looked at a couple of DVD writers that sported 12-speed DVD+R capability, NEC chose to skip 12-speed altogether and jump straight onto 16-speed. But the ND-3500A isn’t just rated at 16-speed for DVD+R writing, it can also write at 16-speed to DVD-R discs, if you can find any fast enough media."The good news is that the features don't end there as it is also the first drive that can burn DVD+R dual layer discs at 4x, instead of the ubiquitously found 2.4x drives that take over 40 minutes to burn a disk. According to TrustedReviews, this is a superb drive, and they have lots of performance graphs to prove it. Hmm, perhaps I should get one because I have really been looking for a nice reliable backup solution for my server that is not tape based.