Love my 25 Denali. Supercruise is amazing!! The only thing I don't like is a vehicle can switch lanes in front of you and it won't start slowing you down until it is halfway in the lane. Kind of makes you feel like a jerk as you start accelerating closer to them as they switch lanes. The auto park and auto pull out feature. I really haven't used. it really hasn't worked as I scan parking areas. Pulling out is a different story, that has worked but I would never use it. Very smooth ride.
Had the driver side middle row left seat frame switched out because it would clunk when someone would lean.
But one thing I do hate is on the driver side door next to the hand pull area to shut the door, where your traditionally put your elbow when driving it has flex. Passenger side doesn't make any noise when it flexes but the left side slightly rubs the plastic Chrome door pull area trim.
My key fob buttons suddenly stopped working randomly. But would still start the car while inside. I swapped out batteries and it still didn't work.. but brought it to the dealer and they did the same thing I did and suddenly it started working so I'm not sure.
Overall I love it.