I went from a Suburban to the X5 and there is a world of difference between the two in terms of luggage capacity but there is even a bigger difference in the way the two drive. I wouldn't have made the two trips in as short of time or as safely as I did. With less cargo room you have to pack carefully. With the Suburban whatever you thought of you threw in the back. I am glad I now have a truck with brakes that I feel confident in.