I have already tested many blanks of different brands, but the MediaRange blank exceeds all others. Very good I think especially that it can be not only 4 times 8 times but even burned. I have tested it on multiple burners and always flawless Bluray was created. According Disk ID is the manufacturer Philips and I will therefore due to my very good experiences with this blank, to create a small reservoir, because the new MediaRange BD-R is 1-6fach produced by another manufacturer and I doubt that he was still very good possesses features of its predecessor.