The AD-7240S isn't as fast as some other drives when writing to DL media at 12x. Due to its CAV writing mode, it takes more than 14 minutes to write 8GB of data. This is slower than other drives that write at 10x using Z-CLV.
On a more positive note, the writing quality is pretty good. I gotta admit that I'm surpised by how good the results are with Ritek's 16x DVD+R DL media.
"Blu-ray is just a bag of hurt." - Steve Jobs