I got the Nav Package. In contrast to another review, I think it works great! Yes, there is a learning curve, but once you are proficient it works fine! Save for the XM traffic report - it does not have. I have owned previous Nav systems with this feature and it is great! We get comments all the time on how wonderful the vehicle looks - it looks like GM hit the mark on this vehicle. My wife drives is the primary driver and she absolutely loves this car over the Saturn ION we traded for it. Yes, the gas mileage went down with the trade, but the ride and the sense of feeling safe in a larger vehicle was worth the trade-off!
Interior trim and handling. Seeing the tire pressures displayed in the driver information display is a great feature!