If you have installed any extras, installation is very easy and fast. With output stage it is interesting. Unfortunately installed Kenwood, like many other manufacturers also only a preamplifier output to the normally expensive radios. Do you need more (eg subwoofer Extra) beat all manufacturers good 100 plan for the luxury model that almost never needs anyone. But you can indeed make do with Y cable.
The sound of the radio is excellent and the operation is simple and intuitive. A multi-line display would be desirable, and probably not much more expensive. But OK.
The front connectors are excellent and my Ipod can be operated properly. The Aux input also works excellently. USB sticks can also be detected quickly.
The playback of Flac is really a great add-on. MP3 files are played back properly from USB and SD card in most cases.
However, I have increased problems with the Amazon MP3 files. These cause many a time an NA File and can not be played every time. All files that I myself have ripped from CD to run properly and every time. I am still looking for a solution. I suspect that the variable bit rate so what to do, the Amazon uses. I can not prove it yet.