Best size and options for the money in the Denali XL version. I love it. It's not too big (i.e. Yukon or Expedition), but is large enough to really seat 6 - 7 comfortably (unlike Pathfinder, etc), or to seat 5 (or 6) by using the 3rd row seat down entirely or split, and still have LOTS of room for luggage and baby stuff (like a stroller). Took it for a 1000-mile trip over the weekend. Great ride, not like a truck, very smooth, comfortable, and steady, with lots of power in the V8. Wood trim and leather add a luxury feel. Power and heated seats (driver AND passenger), voice navigation, sunroof, XM radio, Onstar, all add up to "what more could you want"?
Audio navigation, OnStar, and XM radio - once you try them, it's hard not to use them, and will be even harder to give them up.
Wishlist: Power liftgate, power side mirrors, rearview camera/sensor. Need improvement in the cupholder area and storage area for driver and passenger - it's a little cramped, could use some redesign thought.