For the money you cant really beat this piece, only thing i dont like so far are two things
1. gotta use the disc to change destination
2. there is no icon in the top left of the screen that you can touch to get to your source menu, you have to hit the menu key on the face
there is no extra pins in the black harness like other people have stated
the rca harness has extra pins so maybe its a z-1 kinda bypass
i have yet to try the light flash thing cause they only sent us one and its on my display board
i will update when we put one in a car