It's nowhere near as spacious as an Odyssey or Sienna or Caravan. Nor as nice inside, IMO. In fact, the model S actually has more usable cargo room than the X. The X is just a tall car with a sloping roof that kills all the usable space, just like all the other crossovers on the market. If you want space, you get a van. If you want a tall car that just has a high center of gravity for no reason, then you get a crossover.