This item is in development phase not production. It has some hardware and several software problems. The reason I choosed this item is the DSP function. Unfortunatelly half of the DSP does not work, MCU update will be available later, may this can solve a part of the problem. The apperance looks well. The sound can be acceptable for average users but can cause headache for technical users. Problems are: The package does not include any user manual. It can be downloaded from the site but it is very simple and a lot of information is missing about install and setting (3-4 pincode are needed). The colours of the wires are different from the label at top of radio. The wires of left and right side in ISO speaker socket are swapped. It has DVD ROM but can not play only audio CD and original DVD movie. Mp3CD, mp3DVD, avi mpeg ... movie formats are not supported. Luckily the music and movie files can be played from USB or SD drive. The button illumination can not be set via can bus from dashboard just switch on and off. It has a button named "Loud" but it does not have any loudness function and also can not be studied in the button learning menu. All of the RCA audio outputs are not 4V. These are very weak at full volume the level is only 1V. If you want to use subwoofer forget it. The sub out volume can not be controlled via volume knob and also the Lsub and Rsub gain at touchscreen does not work. If you can accept that you will lose the rear speakers may you can use the rear RCA for subwoofers and use the built in filter in the amplifier. The setting of DSP menu can not be saved. Everytime the parameters need to be set again. It has some pre definied DSP effects which can be selected but the sound will not change and it does not have any sound effect.