Of the MediaRange 507 DL that I had before, I knew that the default rate (Verbrennquote) is slightly higher (2From 10 not run) .Habe four blanks tested with 2 burners (LG and ASUS) on 2 computers (with Windows 7 and Windows 8 ) and 4 firing programs (Nero Express, Image Burn, Ashampoo Burning Studio and DVDFab). 2x focal abort with an error message, 1x completely burned, but is recognized neither by BD players Samsung BD-F7500 Panasonic DMP-BDT700 from yet. The fourth firing was also without an error message but when you play louder picture hangers, sound interference, etc.
Other Rohnlinge are half as expensive, making any problems. Neither during firing even when playing on all devices.
I could theoretically buy new NEN burner for 90 Euro, the then (maybe) the Verbatim has no problems, but (perhaps) with the 3 other blank brands I use. So I stay with the half as expensive to make any problems.
From me no buy recommendation. Product has been returned.