Millenniata 4.7GB M-Disc Write Once and Read Forever, Read 16x/Write 4x Speed, 20 Pack

I visually inspected each disc and they look fine. I mentioned that because I had a few from a 50-pack that weren't too good - one with a bubble and a few with scratches. I've only burned a few so far from this pack at 3X, but they've all verified OK with CDCheck.I couldn't find this item on the manufacturer's website, which made me wary. But their rep. said that this is a discontinued item from a couple years ago, based on the UPC number