Worked instantly on the Aston Martin DB9 that already had the iPod connection built in. I can control the music and surprisingly the phone connection still worked with the car as I was previously connecting to the car’s Bluetooth setting. It’s expensive in my opinion however the value to get back to playing music and having phone calls wirelessly just outweighs it. It was easy to install: connect device the the iPhone 30 pin car audio cable, select iPod settings through the console and hey presto. Also, I’m glad I didn’t need to go to Aston Martin where I may have been charged eye watering money :)