Have bought the mumbi transmitter because of my brother's recommendation and was skeptical, also because of the poor reviews. I can not confirm that. The handling is easy, the unit is quickly operational. The only drawback: it does not accept all USB sticks. I only have 2, and the second is functioning properly. Shuffle I also discovered and thus is the music lucky the car no more obstacles. The noise is sometimes a bit flashy but to cope. Better than advertising the stations switch all. A star deduction for the USB fumbling and the noise. Otherwise, highly recommended!