So, some thoughts:
I am thoroughly impressed with this vehicle. I've owned four military trucks in the past, the two M35 based vehicles, an 800 series 5-ton and a 900 series 5-ton. The HEMTT is unbelievably capable in terms of off road areas. I have videos to come, but the articulation and locking capabilities of the truck are truly astounding. With the truck in low, 1st, and the inter-axle lock on, I'm not sure I could find a place in southern VA that this beast couldn't go, assuming it could fit!
The mechanical features of the truck are impressive as well. It's my first time in front of a Detroit, but I found the engine fully capable of doing what we asked, although I don't think we really pushed it. We did take it multiple times between Cleveland, VA to Lebanon, VA over Cleveland Mountain, which takes you from the Clinch River, at around 1500' to the summit at 2400' or so. No troubles going up or down, but I am thankful for that Jake Brake!
I think the truck will serve us well. I was planning on a full fluid change this trip, but to be honest the evening I went to do it, I couldn't for the life of me find the fill location from the transmission! The engine oil appeared to be brand spanking new, as did the wrong fluid in the transmission, but I'm sure it needs a full dump to be on the safe side.