In my experience, the extra space in the rear storage has been great for road trips. Prior to having our X, we used to take semi-standard rectangular suitcases (the type that you'd can carry on an airplane) and put them in the back of our old SUV. Now we instead pack our clothes in soft-side bags which easily go in the rear below the back shelf. That leaves the main compartment free for our dog crate, cooler, and other large "boxy" items. If we hadn't switched to soft-side luggage, we'd have trouble really taking advantage of the rear storage. Perhaps this will help others to more fully utlilze the rear space in the X.