I would have to agree, Mitsui are THE tops CDR around and have been for a long time.
There is more to a CDR than to be able to just burn them. They need to be read in every cdrom reader and last for more than 10 years. Crap quality CDR's like Princo can be burnt the same as Mitsui on just about any burner, but check them in a year or 2. They will not be able to be read, result > lost data. I have some 7 year old Mitsui Golds that I still read and use regularly today.