My burner is not mimosa and with Nero 10 he burns everything good. (And much ...) The first DVD-DL spindle went through without any problems. But then, the committee heaped imens. I have tried it with Ashampoo and Clone DVD2, always the same result: just before the end all programs can not even describe from Layer2 break with error messages, or. If you "check" before firing enabled, you also get the list of lots of bad sectors, which are then left out when writing. So you can certainly save one or two blank, but testing takes just as long as writing, ie double the time that is the DL-blank 8x anyway long enough. For new product is an absolute no-go Better a few euros more to spend on branded goods.