Just thought I'd provide my feedback in relation to the LG BH16NS40.
Bought purely to convert my blu-ray and remaining CD's (DVD's done ages ago).
The drive is FW 1.00, made in Feb 2013.
Placed into Icybox USB3 external enclosure and linked up to MacBook Pro Retina 13" (via usb 3).
Running with MakeMKV.
D/L disks peak at about 7.8x. Quoted is 8x max, so thats great! S/L are rated to 12x but I have none to test.
I haven't done any duration vs MB's to see actual average transfer rate, but it's quick, thank god, as I only went this route because I heard portable drives were so slow.
No riplock on this drive