Things I am happy about:
-As 16x media becomes more available, I'll be able to use it to it's full extent.
-Has good scanning ability, and can do it way faster than my Plextor could.
Things I'm a little unhappy about:
-I haven't gotten a burn over 97% quality score yet. There's always one stray peak somewhere.
-It doesn't get along too well with my Shuttle case. I had to work on getting it mounted perfectly for a while so the button on my case would hit the button on the drive, and it needs help closing every time. The drive is stealthed behind a panel which opens out with it's hinge on the bottom, and is supposed to close as the drive pulls in over it. The 1640 closes too slow and just gets caught.