Me too. Just got back from Vegas and got 19.9mpg. I have the wagon, and we fit all the luggage, souvenirs, and toys in the back. Went way over the speed limit and the engine was awesome!
On the way back, it was raining. The awd made the car very stable at speeds I wouldn't trust in my other car.
My 535ix touring is probably the best all-around car I've ever owned.