Over the past three years, I have about 300 of these blanks with my external USB burner fired by LG (growisofs under Linux), on incorrect fires I can not remember, although there certainly must have been 2-3 there. And I always use 2 times the speed, because of the burning quality. My elderly Panasonic DVD Recorder plays this well without any problems from, even if the fired 3 years ago DVDs is me so far encountered not a single failure. The DVDs I store in the popular CD and DVD wallets of nylon and eighth very fact that they do not fly around loose, scratched or exposed to sunlight.
Conclusion: If the burner with these blanks get along here you get long-lasting, high quality blanks at a very good price. Then they are fully recommended to other burners, I can not say anything!