I have three kids and an X5 4.4i. Here in Hawaii there aren't really any "road trips" so they do not get to sit for to long. Ages are 13, 8 and 7mo. So with two girls and a car seat in the back it does look a bit cramped but my girls are 50% Filipino so they are small
There is little cargo space though

Much smaller than even my old Grand Cherokee. But my wife loves it and I don't mind whippin' around in it either.
Id get it if I were you