[the 3500 has matured and been developed over time, were as the 3520 is a new drive with different hardware and needs time to develop.]
Understood, however my earlier question was
["So, aside from doing research in this forum, how do you know if its just bad firmware, or bad hardware?
If it's bad firmware, there's always hope, and I assume most good manufacturers will eventually get it right"]
Based on your comment I can see that the 3520 will eventually be as good as the 3500. However, in an earlier post spryfly commented
["the liteon 1213 and 1633 are good examples of this. even after numerous fw updates they are still some of the worst burners availiable."]
So as a newbie what I'm asking is: At what point do people conclude that a drive is a poor burner and that firmware updates are a waste of time.