I ordered this for my 2015 Nissan Altima 3.5 SL with Bose sound system, Steering wheel controls, GPS(factory Navigation) and factory back up camera. Everything was plug and play. The unit does come with an aftermarket GPS antenna and microphone, but I just bought an adapter "Fakra C to SMA male plug" to connect to the factory GPS antenna.
Everything works well the sound is actually louder and I have more control over everything just had to tune the equalizer. Overall I'm happy with the purchase.