Yes, some of us actually still have cassette players in our vehicles. This accessory is much cheaper than having an ipod input installed into your car.
This is a perfect invention. I've used it in so many ways. I have an old car, with no cd player, and this lets me take my music with me wherever i go. It has also helped me when the speakers of my tv blew out. I just plugged it in and stuck it in to my boom box. It worked perfectly. You should defiantly get it.