I installed the Hualingan one in my X1.
It has certain good things, nice big touch screen, good IGO gps view, great rear view camera issue, can connect iphone, usb, audio aux.
But bad things, sometimes slow to connect to satellites, the phonebook with the bluetooth orders with phone number instead of with names, and the microphone to speak is much worse that the bmw previously installed with my car.
I had to retrofit the cable to return using the original bluetooth phone connection with the professional radio.
I can answer your questions if needed.
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