User manual unacceptable.
In Bluetooth mode, the interlocutor cannot be heard, i.e. the microphone is useless.
In Bluetooth mode, although there is an indication for importing contacts, it does not work.
No wireless Mirrorlink available.
During music playback, it shuffles all songs that are in different folders into one list.
And how many more things have I not seen

It does not save phone numbers, the Bluetooth has terrible sound quality for the caller, mine burned the motherboard after 10 minutes of use from installation, I sent it to the dealership and they repaired it, and today, after three months, it turned off again. Maybe it was defective, I will see what the company tells me.

It is quite good for its price. It connects properly with mirror link and both Android and iPhone. In order for the mirror link to work, you need to install the latest update. Send a message to the company to provide you with the latest update. Transfer it to a USB and insert it into the device, the update will be done automatically. You are ready as soon as the installation is finished.

Antonis
Starting with the radio, it does not have RDS and it is wrongly mentioned in the product description. Also, by holding down the frequency change button, you cannot quickly go to the desired frequency. You have to go through all the intermediate stations where it stops, to reach where you want, and this takes time.

A very important issue in a very important function, in my opinion, is the music playback from micro SD or USB. This malfunction is the basis for my rating. So, while you can see the folders and songs you have stored from the files, when you switch to playback, it no longer shows the folders and, worst of all, it arranges the MP3 files in a sequence that only it knows why. And so, while you would like to listen to, for example, folk music, you are forced to listen to files from the classical music folder, light laiko, etc., and this is not even in the Random option. If someone has it and found a solution to this issue, I would like them to share it.
I contacted the company Soundstar.gr, which is the representative, and they told me that the device is like that and if I don't like it, I can return it and they can't do anything about it.
Bluetooth seems to work fine. MirrorLink only works with a USB cable. Photo and video playback seems to work fine.
I have had it for 10 days and I bought it for 86 euros. If you want it for the radio and music playback, I definitely would not recommend it.
I assume that all machines at this price range will have the same problems. If you want something reliable, you will have to go for something reputable and at least triple the price