So far for me, Gladiator, Braveheart, Die Hard have all ripped fine. I’ve been putting some time on the NS40 (firmware 1.02) to give the Asus a break.
Someone somewhere stated they had issues over USB but not over SATA. I had that same problem way back in the early DeUHD days, but never again. That was an OLD PC isolated from my network, USB 2, that I was using because I was concerned DeUHD was some trojan/malware.
We are quite fortunate that these drive manufacturers supported BDXL well in advance of UHD.