Sorry to hear that you can't read the beautiful language Dutch. I hope you will overcome your trauma some day.
It wasn't that spectacular anyway. Roughly summarized:
99min disks come with no orangebook-garantee that they will work. And that since the read/write-path is longer on the same area of the disk, the path is ofcourse more narrow --> use no more then 12 Speed.
Not all burners can use the full diskcapacity so look at the list.