The RLX is Acura's flagship sedan; but it's not the sort of car that screams for attention and recognition. It doesn't feel like a car for extroverts, even though its performance is impressive and satisfying. It's one of the more subtle luxury cars, with an understated design and an interior that's relatively free of gimmickry—and that altogether, we think, makes the RLX an intriguing outlier in the market. The RLX is Acura's flagship sedan; but it's not the sort of car that screams for attention and recognition. It doesn't feel like a car for extroverts, even though its performance is impressive and satisfying. It's one of the more subtle luxury cars, with an understated design and an interior that's relatively free of gimmickry—and that altogether, we think, makes the RLX an intriguing outlier in the market.