The Iron Man 1-3 BluRay + UHD Boxset I bought arrived sealed. The disks were clean and shiny under every angle. YET THEY WERE DEFECTIVE!
I asked a friend if I could borrow his disks and the WH14NS40 as well as the BW-16D1HT ripped them without an issue!
So the lesson here is that even if the disks is brand new, arrived sealed and looks flawless, it can still be broken!
Please post here for issues related to UHD discs