I had a new BenQ 1620 that burned fine, but always got hot even when it wasn't burning. It burned DVDs fine, but I didn't like that it gets so warm even after light use. If you put your nose up to it, you could even smell a strong burning odor.
That isn't normal for a DVD burner, is it?
So I returned the BenQ to Newegg after only a few days of use. They were cool about it and let me exchanged it for an NEC 3520, they even waived the restocking fee. Even though the Benq worked fine, I didn't like the fact that it gets so hot, since heat is the enemy of all computer hardware.