Well, I picked one up as well, and can say that it works well on my 98 Audi A4 2.8l. After 10 years, my tape player is just about shot and the tape adapter wasn't working very well.
My next car, whenever that is, will have an aux jack. If my Audi keeps driving like it is now though, that will be another 10 years. I usually get bored with a car in 3-4 years, but not this time.
