This product performs beautifully, gives great sound and makes an MP3 player work ever so much better than FM converters, or Cassette adapters. My only complaint is that the switch that selects the input is a little cheap looking and does not mount well in the car. That said, I've been shopping for one I like better, and haven't found any. Perhaps I am just too picky. Other than a minor complaint about the aesthetics of the switch itself, I love the device. It is otherwise perfect.