After saying the sound quality was quite poor I have to retract and say it is not too bad after all. I had only ever tried the headphones that come with it but when I tried my proper head phones the difference was like night and day.

Sound quality on the FM transmitter didnt seem to bad either. Many people had complained about it so I expected it to be quite bad but it was just as clear if not clearer than any radio station. I only tried it with the car stationary outside my house though. Don't know what it would be like when I am driving around. Was just happy to hear it work because it did not work on my N97.