This item in general is amazing, it converts any old car into a modern one, with Bluetooth connection for music and calls. The design is simple and solid, much much better than the ones with flexible arms and stuff, that tumble all the time with the vibration of the car. It can fit in a very small space, so no risk of interfering with the hand brake. No radio interference at all.
The device is pretty much plug and play and goes straight into a 12v outlet/cigarette lighter. Once you have found a open FM frequency you just have to match the device to your radio and it's good to go. Then pair your phone to the device and away you go. I did find a little interference at times from my phone, but overall the sound quality is great given the nature of the device and the price.