Picked up my 550i on October 6 with my wife and 15 year old daughter and returned it to Munich on October 18. Car was even better than I expected...although my expectations were very high! Expect re-delivery in another 10 days.
We spent four days in Bavaria, two in Salzburg, three in Lucerne, two days in Lindau, and two days in Montbaur. Pictures show car at pick up center (after spending night on plane), Grossglockner road, view from Eagles nest, Salzburg and Lucerne.