First SUV (if you can call it that) I have owned; love the NAV system. The salesman showed us the dealership owner's demo first that did not have the NAV system. What a mistake, we almost didn't buy one but went back and took a Limited for a test drive. So far combined mileage about 60% in town and 40% at 70+ mph is 19.8 and at 65 mph the NAV system says we are getting 24 miles per gallon, which is not bad for this size of car.
NAV system and heated seats, my airline pilot friends say this is the best NAV system they have seen in a car. It compares to the 2000 dollar Garmin models.
Make the NAV system and DVD available in the 5 passenger model; the back two seats are small -- only useful for short trips like to a restaurant or movie.