I have a 2000 4. 7 V-8, 4x4, Auto Dakota since new. It's been very reliable, though we've had a few issues.
There are several recalls on these trucks. Clock Spring and Ball Joints are the two big ones.
Yep, gas mileage sucks. Around town no better than 12mpg. On the freeway best I've ever gotten was 16mpg.
It does haul fanny though!
Oh, and the truck got backed into a few years ago, and though we had the body work and condenser repaired, the A/C has never been the same. Reading up on the subject it seems as though the radiator is no longer properly cooling and will need replacement. So try running the A/C on a hot day in traffic and see if it still cools.
GulDam