This thing is hit or miss. I just returned 2 today because although it received radio it failed to transmit from the iPod to the radio. (I really don't see the point in being able to hear the car radio with the iPod either.) And it sucks the the life out of your battery.
I paid $17. Now you can get it for $10 after rebate? The deep discount from the so called list of $128 should make you ask, "why so cheap?" Did I mention it drains the battery?