I drive a 2014 KW with an Auto and I love it. My only complaint is when I just need to move 12" in a dock door or a parking hole. It will either want to jump 36", or not move at all. I do a fair amount of mountain driving in CO and WY, and she does fine. I've only had to manually shift her maybe 3-4 times.
But overall the good by far outweighs the bad.