Im pretty sure it's just a case of not pairing the phone to the factory Bluetooth and instead pair it to the Dension. Installation was simple, it's a plug a play device, everything plugged into the factory loom, no cutting was required, the hardest part was running the microphone cable to my required position. Price wise it's about £160 and yes it works well, phone wise it appears to be more stable than the old factory BT, I don't recall it ever dropping its signal, music wise it can be controlled from ether the phone or the MFSW as can the phone functions