Super easy install if you want basic functionality. The wiring harness is plug-and-play. 1. GPS was easy to install, simply run the antenna where you want it (I drilled a hole in the center of the dash and went straight in through the center tray to the head unit). The GPS iGo software on this unit blows my Magellan out of the water. It's not even a fair comparison, I cannot say enough good things about it. 2. The DVD player is cool, works when driving too, and plays through the factory speakers. A great feature for my daughter who is whiny during long road trips. 3. iPod connection works very well, I drilled a small hole in the glove box to run the wire to the deck and simply connect my iPod to the glove box and I have access to all my music. 4. The unit does work well with steering wheel controls. It does not work with the mini display, it blacks that out. I would have given this unit 5 stars if it had come with installation instructions. by Ian Osborne