Hi all, I got the 1655 OEM version with Lightscribe. I'm pretty satisfied with it. Been using BCDB Firmware which came standard. Already burned DL,DVD+R,DVD-R,DVD+RW, CD-R and CD-RW discs with it. I don't think there's anything different except cosmetics and a faceplate that says BenQ on the Retail version. They are basically the same drive.
I also like the Lightscribe feature, creating neat looking labels. You can read more about my various burn sessions with the 1655 in my blog below, I update it every now and then.
Feel free to ask me any questions about the 1655. It's a great drive to have, and now that it's on sale, that's even better!