I have my first NEC drive (ND3520A) and would like to know how many burns these drives typically get before they start going up? Or how many burns you expect from them?
I got about 600 burns on my NEC ND2500A if that helps at all. Then the drive started failing. You might get more than that - it's probably more of an issue how long that laser lasts in there.
By the time the drive fails of old age you will probably be ready to buy a brand new 16X dual layer burner.