I've had my V6 Limited for exactly one week today and figure I would share some observations from some light off-roading I did yesterday. As a comparison, my previous Jeep was a 2-door JK Rubicon with a small lift and 33" tires, so getting out of the habit of being able to climb over just about anything will be tough to break.
I took it up the Mt. Ord road and for those of you near Phoenix that have been on it, you know it's by no means a Jeep trail but it does have a few side trails that you would want low range for. First and foremost, when you have the Quadra-Lift raised up all the way, it rides rough. I don't know if it's because of the maximum levels of gas in the shocks or the change in the angles of the suspension arms, but it is a significant change from the smooth ride at normal ride height and quite a bit from even the Off-Road I ride height. And if anyone was wondering, it won't stay at either of the Off-Road suspension settings once you get on the highway and speed up. I'm not sure if there is a way to override that but unless you like a rough ride, I wouldn't recommend it.
Second, the hill descent control can be annoying. Has anyone tried this and noticed that it makes some strange noises down below the dash? I think it's the actuator for the brakes but certainly doesn't sound normal. I'm going to take it in just to make sure nothing is broken. If you've had any decent experience with a Jeep off-road, chances are you won't need it so I'd recommend turning it off.
Those are really the only two complaints that I can think of. I don't really mind the rough riding part since I don't plan on needing to use the maximum suspension height that much. Short of being in a Wrangler with the top down, the new GC with the dual-pane sunroof is a great way to experience the outdoors. It was great driving through Oak Creek Canyon yesterday with the sunroof open and the windows down. And even with the serious wind out of the south yesterday, it still drove great down I-17 and average mpg was in the mid-20s. I'm only on my second full tank of gas and haven't reset the mpg meter so I'm pretty sure it will improve.