I have owned the same truck now for 8 weeks and 3,000 miles.
There are a few very vocal people who don't like this powertrain. It's not the most refined out there, but that being said there isn't anything wrong with the transmission.
I averaged 17.5 miles per gallon at 80plus mph recently on a 1,200 mile road trip. Not bad for a truck driving that fast.
This truck with incentives and dealer discount is far less than the Dodge or Ford. I have the 5.3 with the 6 speed transmission.