I love mine!:)
When I first got it, I had heard about the tendency to falter in damp conditions, so, after driving at a steady speed for several hours in the rain, I punched the accelerator and, sure enough, it faltered. I took it back to the dealer. They reflashed the computer and I haven't been able to get it to falter again. A friend has 50K miles on his, many of those pulling a loaded stock trailer. His has never skipped a beat.
It pulls my trailer MUCH better than the 5.3L Chevy it replaced.
I'm retiring in 2 weeks and can't wait to keep the road hot with it. I'm anxious to return to Colorado and I have complete confidence that it will pull those passes easily. Look up "Ike Gauntlet 2.0" on Youtube.