I just purchased my new 2016 Super Duty with the 6.7 engine this past June. Currently sitting at 17k miles. 80% of the mileage was from a two month journey around the Pacific Northwest. I have a topper on the truck, with a Decked storage unit in the bed and BFG All-Terrains on stock, 20in rims. Here are my observations so far:
-It took around 7-9k miles for the transmission to 'break - in'. During that break in period, the shifting of gears (mostly between 4 & 5) on inclines could be felt, as if changing gears while going up a steep hill on a bicycle. After that break in period, the shifting has been flawless on inclines. I asked the dealership about the hard shifting during my first oil change and they said that was normal, even though I thought it was pretty f'in annoying.
-Engine has a slight delayed response on throttle response from stop to about 30mph. I would say from 40mph -70mph this thing is a rocket ship if you floor it. Very quick response, gets very good gas mileage from 55-78mph on the highway. Anything higher, you are losing MPG, and city mileage was 13mpg. Very quiet engine from cab, even when sitting idle at a stop light.
-Has a nasty bump steer, most notably on the highway. Probably my least favorite thing about this truck. I imagine when I upgrade my stock suspension and steering that will go away.
-Built from my hometown, I got a nice discount at the dealership for having a friend work on the assembly line where they are built.
-Amazing feel on the highway. Very comfortable, quiet and nice luxury (I have the lariat package). Feels very sturdy, and love having lockers front and rear. Makes a huge difference on trails.
In general, I am very happy with my new purchase. I decided on the diesel engine knowing that I was wanting get out of the Jeep game and find something more, long-term, reliable and practical. I have never driven a Dodge or Chevy so I cannot say if it better than the Ram, but I will say, I have never had buyers remorse, even with the bump steer and break in period. In other words, every truck has flaws so I think its just pick what you feel comfortable with, whether it is brand loyalty or some unique feature that is really selling you on that purchase.