Put 30k on in the first year. For the most part the truck is great. Have owned several Cummins Dodges. Spend a lot of time in the diesel performance arena, and nothing beats the Cummins. Considerably better trucks than my past Cummins Dodges. Better brakes, better ride, better stock power and better stability for heavy towing. Mileage will never match the older 12v's. Too much stock power and emmissions equipment to have great mileage. Still much better and more powerful than any gas engine. Will buy more Cummins Dodges. Five in the family now.
The Cummins is hands down the best feature. The brakes are next. I am surprised with how well the 48RE auto has worked, having rowed gears the last 15 years.
The TIPM. Totally Integrated Power Module is too sensitive to be on a work truck. If you plow, tow trailers, or add additional accessories it will probably trip. Only way to fix it is with a dealer reset. Six resets and the unit needs replaced at $600 + labor. Only applies to 06 and newer.