This truck is very comfortable, quiet cab, nice controls etc... but what really makes this truck disappointing is the GEARING. Nissan posts the truck has 379 ft/lbs of torque and the lowest gears you can get are 3.36:1 with the big tow package. The best fuel miles I've gotten are 16mpg on the highway. You cannot make this truck accelerate just because it has a 5-speed transmission. Go Drive a NEW Silverado with a 5.3L (smaller) engine w/ 3.73:1 gears, result - the Chevy will out pull, out accelerate this Nissan everyday of the week and twice on Sundays plus the Silverado gets 19- 20mpg on the highway because of its OVERDRIVE transmission. GEARING is EVERYTHING in a truck this heavy. GM wins.
CHANGE THE POWERTRAIN GEARING ! Make 3.73:1 and higher Available, Throw in a 6-speed Automatic with 6th gear being OVERDRIVE OR make 5th Gear OVERDRIVE. You have to OVERDRIVE a Vehicle this heavy to get FUEL MILEAGE and you can't do it when all you offer is 3.36:1 gears.