Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Easy to set up, doesn't work

There is a fundamental flaw with this product. The device relies on a "weak" FM signal to transmit music from your iPod through your cars stereo system. Because it relies on a weak signal (the user guide specifically says "look for a weak signal", the sound quality you'll get through your car stereo is that of a weak signal--lots of static, fade, cross-talk, etc. It may be easy to set up (plug it into the cigarette lighter and you're done), but the bottom line is the sound quality is very poor.