I have had my Flex for 2 weeks now. It rides very smoothly and plush. The interior is nicely appointed. It drives nicely in the city and on the highway. The SYNC system was easy to set up -- don't know how I ever lived with out it. I will never ever buy a vehicle without SYNC -- I am hooked! Industry leading technology. We are able to load up the kids, their friends and all their gear with no problems. Gas mileage so far has been averaging 23 mpg (mixture of highway and city driving)
SYNC. Fold flat rear seats. Power lift rear door which can be opened with the key fob -- really nice when have a load of groceries in my arms. Flexibility
Under the floor storage would be wonderful. Can't think of anything else.