Just for checking the scanning capabilities of the 3540, I thought it might be interesting to compare the results when scanning at different speeds.
Here's the 1x scan:
This is the result at 5x:
That's what it looks like at 8x:
Now for something completely different - 12x:
And finally at full 16x:
Funny thing is 1x and 16x give the same quality score in Nero. So I think I'll keep scanning my discs at 16x.
Here's a transfer graph I created on my old Toshiba SD-M1612 DVD-ROM:
The graph on my 3540 shows no problems: