Whether it's space, comfort, or versatility, the RDX does a fair job at equaling tough competition like the BMW X3, Lexus RX, and Audi Q5.
Last year's redesign brought a roomier RDX, with improvements for front and rear passengers, as well as more cargo space. In front, the cabin is comfortable and relatively spacious, with enough adjustment to fit both taller and shorter passengers. The seat bottoms themselves should be longer, for more support. The back seat isn't wide enough for three passengers of the adult variety, but tall passengers won't have much to complain about.
The cabin isn't as tidy or lush as that in, say, Audi's Q5, but Acura does a fine job of sorting out the RDX's trim and fit and finish. A well-organized cabin has lots of storage spaces, and most of the controls are laid out in a logical way.