The 2011 Suzuki SX4 models are far from luxurious inside, but they have well-configured cabins with accommodating seating and reasonably good refinement.
Inside the SX4 you'll find better seats than typical for a budget-priced small car; they're well bolstered in front, with a nice, upright position, and while the base nylon seat fabric certainly doesn't scream elegance, it's comfortable. In back, theater-style elevated seating gives both more legroom and a less claustrophobic feeling; there's enough space for two adults in a pinch.
With the seat down and the load space filled to the ceiling, the Crossover and SportBack can handle a more useful 54 cubic feet of cargo. The sedan's trunk holds 15.5 cubic feet of cargo, fairly good for the class, but the hatchback's short tail means luggage space is restricted to 10 cubic feet to seatback height, only enough for several grocery bags unless you fold down the split rear seat.
Ride quality is nicely damped for a small car, and the SX4 measures up well in refinement except when you press the engine hard, as it becomes quite coarse—even in the middle of its rev range when pressed, or anywhere above 75 mph or so. Wind noise is well suppressed, and through most of the lineup there isn't too much road noise. Plastics are hard up close, but they look good from even a few feet away.