Very poor sound quality during calls, they can never hear us... also, the installation was difficult.. otherwise good :)

Easy installation! Its menu is very user-friendly! The applications (Spotify, YouTube, play store) load satisfactorily for its price. I haven't spoken through Bluetooth to see if the other person can hear me, but for now, I don't expect good performance because most noname brands on the market are the same. Nice bright screen with a nice touch. You can change many themes/icons/photos so you don't get bored! The buttons on the left have lights that you can change colors. I am very satisfied with my purchase at this price! I would have liked the package to include a remote control like the old one, but okay.

Installation on opel vectra c 2004 without extra base or front panel. One day of operation, the screen has good touch and resolution. The radio has reception like the factory one but without RDS. Android without any crashes, but I haven't added any new apps to it. The navigation is in English with Greek voice, without announcing the streets but with clear signal and no delay. Hands-free calling is very good and immediate connection with Bluetooth (downloading contacts and call lists from the phone). Everything is good, especially for the price.
UPDATE
I am still satisfied. I installed Sygic navigation, obd2, and dub music player and everything is working well. For the obd, I changed the Bluetooth code and installed a Bluetooth connect app from the playstore. Lastly, when pairing with the mobile's wifi, there is some lag with large videos.