My old X-trail (09 plate) is massive inside. The extra height over a normal estate car allows for vertical orientation of items that would normally have to lie down if carrying really big loads.
It was adequate to transport 3 of us with room for another - 2 electric guitars, one bass, one acoustic (all cased), guitar amp and cab, bass combo, guitar stands, pedal board and kit bags all in the boot. I could even still see out of the rear view mirror.