People have been saying for years that tapes would die, but fortunately, they never seem to. I know a number of people who have the car stereo that has BOTH  cd and the cassette. For that matter, I am starting to see cassette walkmans again. If you follow my reviews, you know that because of the dangers of cd rot, I prefer to make tapes of my cds and use them when possible. For those of you who don't know about cd rot, it is capable of wiping out a whole collection of cds. What happens is that heat and moisture turn the cd purple and make it unreadable. (In extreme cases, holes in the cd are prevalent.) If your cds are not so over the top, they may actually transfer well onto normal bias cassettes such as Maxell UR or TDK D. A previous reviewer pointed out that if you are making tapes of your cds to use in your car, a lot of times a normal bias cassette will suffice, since most car stereo speakers are not designed for high output. (He called the Maxell UR a perfect workhorse tape.) But moving to the high quality TDK SA tape, these tapes are superb and capable of holding the material even from high intense cds such as "Metallica's" 'Ride the Lightning,' "Megadeth's" 'Rust In Peace,' or "Exodus's" 'Tempo of the Damned.' I'll conclude by saying that TDK SA will not only give you excellent travel friendly copies of your cds, but using them when you travel will keep your cds safe from cd rot.