1. The plastic housing is the Marantz reputation and the price does not really do it justice.
2. See the display texts no German special characters (umlauts and "ß"). If a radio station such incorporates in the text, appears on the display garbage.
An inquiry to the Marantz Service has confirmed the finding. But it has no intention to change that through a firmware update.
3. Occasional hangers have to be accepted in spite of now several OTA FW updates.
Recently came to power, no matter whether preset analog tuner, internet radio or CD, only a horrible loud buzzing sound. Remedy managed only a reset.
4. The operation via the Android app (really a great thing) also adopted occasionally. One must intervene with the supplied remote. Only then can the app also reuse.
Except for the plastic housing can turn everything off. But because of the German special characters would probably all German customers clutter the mailbox service, so what happens there.
Addendum: point 3 is now past. Therefore, I raise to 4 points. Also, since the device is still true is serving.