Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very easy!

After looking over reviews for both FM transmitters and cassette adapters, I decided to purchase an adapter. I am so glad I saved myself the money by not buying a transmitter! The cassette adapter was incredibly cheap and works great!!! The sound is just a little bit off from when I play the music directly out of my phone (HTC droid Hero) but is easily fixed by adjusting the bass and treble.