In front, most will be happy with the seating and driving position. There's good headroom all around, but in back the cushions are rather hard and flat and only wide enough for two adults. Also, the backs of the front seats are finished in hard plastic, which adult knees will likely be up against. The downward sloping roofline cuts into the cargo area a bit, but fold the back seats forward for larger items and you're golden.
The Acura RDX has a plethora of handy storage places for things—and not only the small stuff. There's a false bottom to the center console [shhh...] with space enough for a purse, while the main compartment is lockable and large enough for a laptop. At the top there's a shallower tray that can be removed. In addition, there are smaller cubbies in the middle and side of the dash, and the doors have lidded compartments for other small items.
Fit and finish in the RDX is excellent, and the RDX's interior spaces are fitted with lots of finely grained and silver-painted plastic. It's a look shared with lots of portable electronics, and it fits the brand's image well enough, though at the price point some shoppers will want lusher trim. Seats are upholstered in rather soft ventilated leather, controls nearly all have a pleasant tactility, and there's no looseness in the door panels or center console. Furthermore, visibility isn't the issue it is with many other crossovers, thanks to the rather low beltline that carries throughout the vehicle.
With a vehicle like the 2011 RDX, which has a suspension tuned for crisp handling, ride quality usually suffers somewhat. That not so much the case here with the RDX. It feels quite firmly damped but moderately sprung, so while it turns in with relative crispness, it's designed to keep it safe yet satisfying for any sane driver's needs on a curvy road while also absorbing major heaves quite well. The downside is that the RDX's ride is busy; it's not jarring, but it gets thrown around by pitchy surfaces and there can be a fair amount of road noise.