Apparantly it is easier to do the same for + with this drive. Verbatim's work well with the +.
Haven't yet tried doing the same to the - media. I'm using 4x - media, IMO the extra £££ for 8x is not worth it, well that's the case in the UK at least. I do enjoy, however, being able to burn DVD+RW at 4x, which I tend to do a lot more of.