I had installed a double din Pioneer which went in without modifications. The installer hooked up the steering wheel controls without any trouble using an available adaptor. Bluetooth came with the unit and installed mic neatly above visor, works great. Also included backup camera, which works both when I put in reverse and manually. Nav works well through my iphone with 3rd party app. I also have rear stereo and video output for passengers in the back seat. All the toys w/ the six speed. Biggest headache is that there is currently no after market adaptor for the antenna and we are waiting for Meta or others to come out with one so I can enjoy HD radio with this unit. Total cost w/install 2000.