One of the benefits of the AT4 is the technology options. The rearview camera and the all-around camera view is probably my favorite item. It certainly makes parking the beast simple. No blind spots, and you know exactly how close you can get to a wall or another car. Not having to fix the truck, or worse, another car certainly makes it worth it. And if you plan to go off-road, you need the camera views.
I also like the HUD display more than I thought I would. I can take or leave the sunroof. I'm tall, and would prefer the extra headroom, but dealers around here always order them when they add the extras.
The lane assist is actually helpful, and the warning of a collision is helpful. Did you know the seat vibrates to alert you - the left side vibrates if you are close to hitting something on the left, same on the right. Both go off if you are backing into something or if thinks you will hit something.
Overall, I love it and love what it provides. The big downside of course is when the technology items start having issues...