I have a 40 gig iPOD, purchased after friends raved about the quality. They also mentioned strength of the iTrip: 5 cars travelled long distance, all tuned in to the iPOD and all were able to receive the signal well! On playing songs via the car radio using the iTrip, my initial impression was that the sound was awful. It doesn't sound so bad now so maybe my ears are just getting used to the compressed sound. One problem I do have though is that there is a great deal of interference coming through from other cars when I am in traffic. This is not much of a problem on the open road. My friends don't complain of this and I'm wondering if I have a particular problem or faulty gear. Would the fault be wit the iTrip, if so simply swapping this out should solve the problem. I've read the other threads about using the line out and headphone out. My experience with laptops is that the output from the headphone out is much lower so you have to crank up the volume on the amp, whereas the line out is fine. I presume the output from the iPod itself is headphone and the one from the docking station is line out. I'll try these out soon and comment. My use of the iPod is predominantly in the car so getting rid of the interference is my main concern.