Just got back from a 500 mile trip to pick up some deck boards from my sister in Medford, OR. I loaded up as many of the boards that would fit in the bed and headed back north up I-5. I had 4 small mountains to go over with mostly 6% grades, and the truck just drove up those hills, with all that weight in the back, like it was nothing. Really impressed with the power the engine has. The truck was very comfortable on the drive and even my pup (that hates to ride in the car) didn't seem to be as stressed out in this truck. I got about 23mpg on the way down and 20mpg on the way home. I know I'll get better mpg as the engine gets a few more miles on it. The only problem I had was my iPod would only play about 10 songs and then stop. I had to keep unplugging it and plugging it back in.
I know there are people out there that say they will never get the 4cyl in a truck, but if they would just drive it, they might be surprised. Just like I was.