First of all, the Benq 1640, is very good at error correction, better than NEC, the seek time is seriously reduced (i don't understand the Nec stuff policies, they are stubborn, and not decrease the seek time 120ms for CD-s and 140ms for DVD-s). Althought, Nec is most likely the best DVD burner. Yeah, they still have some problems fixing the Cd error corection. Even the Benq 1640 is a high quality burner, though Nec is superior. The tests prove it.