The 2015 Infiniti QX70 looks sporty and feels that way, too, but that doesn't necessarily translate to much useable space inside–or to the quiet, comfortable interior you might expect from other luxury crossovers.
Delicate details are the surprise inside the QX70, akin to those used in luxury sedans, not utility-minded vehicles. The leather is soft and quilted with subtly colored stitching, and the assembly quality of almost every version we've driven has been excellent.
One thing inside the QX70 isn't quite up to luxury-vehicle standards, and that's cabin noise. You hear coarse road surfaces a bit too much, and V-8 models especially tend to have too much engine noise--in a muscle-car sense, almost--for most tastes. Ride quality varies depending on which model you choose. V-6 models are firm without being at all jarring, though opting for the 20-inch wheels over the standard 18-inchers can induce some real ride harshness. The QX70 can get very choppy on urban interstates, where pavement junctions don't always meet eye to eye.
The QX70 is a great place for long highway trips--provided you're in the front seat. If you're riding in back, you can't be too lanky as there simply isn't all that much legroom or headroom. The interior is sporty-car snug in places, though in front these models have firm, enveloping seats with a fair range of adjustability and with heating and cooling in most versions. They're great for a long day of driving, and the seating position itself is low enough to ease entry and exit.
In back, the QX70 is tough to get into, with the arch of the roofline getting in the way; and the most surprising find--in this vehicle with about the length and footprint of a mid-size sedan--is that leg room is so skimpy. Folding the seats forward yields more cargo space, but the bin's small to begin with, and the cargo floor is high. The standard power liftgate does soothe the sting of not being able to cart home half the big-box store.