Having toasted from these blanks already more, I can only give the following Judgment: For backups, these blanks are awesome. Data is stored long and sure, they can be quickly and labels describe (my 48-Plex really writes 48x with little to no mistakes. I had the failures never burn. Should they, however, have to use it as a music CD or (S) VCDs you expect that they (correctly) not be read. In my car stereo (Panasonic) and my CD player (Harman Kardon) will not read them, but my Cyber Home DVD player eats them without grumbling. As I said, for use on the PC I can only recommend (5 Stars). One point deduction's for use in the multimedia sector - here you should switch to other blanks. 4 stars