I have had three 1620's and now that Benq is producing poor G firmware ie. G7V9, my advice is to flash to retail and use B firmware (plenty of instructions on this forum). I currently use B7T9, B7U9 and B7V9. My best scans so far 100% have been with B7V9 although burning is sometimes slightly slower than T9 or U9. It's really a case of personal preference and what suits your particular burner and media. If you flash to retail version, your burner will show up as Benq instead of ATAPI. Good Luck.