First, the sound of the radio is very good, I hear from time to time and loud music to create the device without any problems, without any noise is heard. Unfortunately, with me often depends the CD for a brief moment when I'm driving over bumps, it then jumps like a brief moment back and plays from there. I personally do not mind, since I already always hear from a USB stick to music or audio books, but great it is not natural. There are the default settings that also allow an example that the music from CD or USB, the message traffic to hear are automatically switched on. It is then, without having to do anything, switched to radio and then of course back to the same point of the track, one has heard before. When I drive long distances, I turn this option gladly. Reading my USB stick is very fast, even though I have a few GB of music and audiobooks on the stick. The options are mediocre clearly, but one gets along. The installation was also very easy. All in all, I am very satisfied with the radio and would recommend it in good conscience.