After a month of use, positive aspects include the appearance, the ability to connect to any mobile phone, the built-in mobile base, nice colors, front cover case, external microphone, and DAB radio capability.

Negatives:

Multiple disconnections via Bluetooth from the mobile device.
Difficult menu navigation.
No instructions.
No DAB antenna included in the package, so you have to purchase it separately for an additional 25€, plus the cost of installation.
With certain music tracks using the same phone device, same Bluetooth system, the sound through the Bluetooth connection with a portable JBL speaker is excellent. However, when connected to this sound system, the sound is simply unacceptable.
Unfortunately, the update for the device is equally difficult and user-unfriendly.
It's a shame, I expected more quality from this particular company.

Unfortunately, the main and most significant problem is the Bluetooth connection. While manually making the specific connection, yes, the device and the phone recognize it, but when I open the PIONEER app for the Android system, it shows that it's connected, but the app doesn't open except after many attempts. UNACCEPTABLE.

November 2021

After contacting through the Google digital app, specifically the PIONEER app, after writing complaints and negative reviews, specifically about the Bluetooth and the software they provide, yes, there is a noticeable improvement in the responsiveness of the device and the program, immediate response of the connecting system via Bluetooth.

I also installed a Pioneer DAB antenna for 25€. There are digital radio signals available only from ERT, and yes, there is a noticeable difference in the audio quality and signal quality as it pertains to this radio reception system, but it doesn't work everywhere in Attica. When there is complete signal coverage, it is definitely worth it compared to the current type of radio signal broadcasting.

March 2022

Multiple disconnection problems via Bluetooth after software upgrade, and even more problems with the connection than before.
They need to seriously address the software of this particular device.

As for my sound system, this is purely my personal opinion, it needs an upgrade in terms of the speakers.