Not a good design
The iRock's sound quality is on par for most of these FM transmitters, they all sound bad. I was aware of the sound limitations when I bought the iRock, my big issue is the design and placement of the power button. It is set up in such a way if you put it in your glove box (or just about anywhere) you can guarantee something will press the power button and run down the batteries. Very frustrating. The iRock also limits you to only four station radio choices, 88.1, 88.3 etc. Since I live in Boston, a fairly large city with many, many colleges, those frequency are being used. So the iRock is useless for me when I am downtown. As soon as I get out of the city I'm fine. There has to be a better unit out there.