Super Easy!!!! So easy a caveman can do it. Everything was plug and play. Removed the underneath storage bin in preparation for the sub-box. Installed the Rack in about 30 minutes. Wired the Amp inline with the stock Amp. Put the sub wires under the seat and closed up that side of the truck. The passenger side was just as easy. After running the power wires under the truck ( very easy to do) found a good spot to pop 2 holes in the body to run the power and ground into the cab. (Watch their videos for this). Cut the wires to length and installed them into the power junctions on the Amp rack. Had the wife help me load the sub box into the truck. (It's built like a tank!) I have the 3 JL 10's in mine. Plugged in the 2 power cables into the box. Hooked back up the batteries on the truck and it sounds AWESOME!. Plenty of bass in that truck. I wired the bass knob just under the start stop button and ran the wires down the drivers side floor trim and plugged that into the amp.
Overall, this system is the best out there. With minimal tools. You can do it. I took my time and I had it all installed in about 3 hours.