Item is working good. But it is NOT working in BMW e38 with BP8266 radio (year 99).
i managed to install it to my bmw e39. initially i cld not play the music. But after reading the instructions carefully, i take out the rear cd changer connection, create the proper folder name for the music files, use 8gb size usb as recommended, and i manages to play music via usb! Good sound quality. i have yet to try the aux input. Most important, read the instructions.