The whole thing is that a CD-RW at the time, just does not imprint as good as a CD-R which is only done once. You can not record again on a CD-R.
They were only suppose to last say around 5 years or so. I still have some that are older and not a problem at all. Anyway that is what I had read at one time.
If you do not mind trashing anything later, then DVD-R would be the better disc to use. But that will be that no matter what you use.
I just burn at a slow speed, because it can go bad or not as good at faster speeds. I always burn at the slowest speed to make sure it is accurate (but it takes longer).