Easy setup.
Simply connect the adapter (which includes illuminated USB ports) to a 12V car socket and you're ready to go.

Quick connection with satellites and easy mode switching with just a press of the single button it has.
Of course, further adjustments can be easily made within 1-2 minutes (units, time, etc.).

I think there is no disadvantage and it does its job perfectly.

Finally, something worth noting:
At first, there was a significant deviation from the actual speed of the car (around 14 km/h at 130 km/h shown on the speedometer), however, after driving on the Egnatia road for about 200 km, the difference dropped to 7-8 km, which is the usual deviation from reality (it performed some kind of automatic calibration).