The installation was fairly straight forward even without instructions. I would recommend putting the cables in separate bags with a description label as my unit came with 2 sets of harnesses and I had to figure out which one I needed to use for my car. I was nervous after turning my car on right after the install as the screen was frozen on the “11 Navigation System” screen. I turned the car off and turned it back on and thankfully, it booted up to the main screen. Overall, I am happy with my purchase!