Just got it today and so far it is all I hoped it would be. It replaced a LiteOn SOHW-1673S I got about 2 weeks ago that I wasn't very happy with. I flashed it with B7T9 firmware and am using up some "value" TaiyoYuden DVD-R 4X (TYG01). 4 burns so far with nothing scanning below a quality score of 97. I'm looking forward to getting some faster media.
I was a bit disconcerted when I noticed the green LED staying on, but quickly found the thread in this forum and realized it is normal whenever there is a disc in the drive.
I want to thank everyone here for helping me choose the DW1620, even though I didn't actually ask anyone's opinion. Just reading how most of you were happy with your drives, and particularly with the outstanding quality of the burns was what convinced me.