I have the 3.9L v6 with 87k mi on it. No major problem as would be expected for a truck with this much mileage. Only problem is from time to time the evap system triggers the check engine light, a trip to Autozone fixes that. Gas mileage could definitely be better. I drive approx 20 miles a day to work, and bought the truck when I went to school right down the street. Most fun to drive of any other vehicle I've owned. For a truck with this much power it is still easily driven in inclement weather if you know what you are doing, if not you're in trouble quickly. Another bad feature is the the center console was designed for the automatic and they didn't change it for the manual, can get in way
Comfort: I have never felt more comfortable driving any vehicle. The stick has a very comfortable throw to it. It is longer than my friends vehicles and I would not have it any other way. It seriously feels as if the truck was made for somebody of my size. (6'3", muscular build). Very study build too
Change the center console to accommodate for the manual transmission. I don't like how I have a cup holder I can't use.