Is the Hyundai Sonata a Good Car? Yes, the Hyundai Sonata is a good car. It gets good gas mileage and has an upscale interior with two rows of roomy, comfortable seats. Trunk space is decent for the class, and there are plenty of standard features, including an easy-to-use infotainment system. Additionally, the Sonata has a good predicted reliability rating. It doesn't quite match the performance abilities of some rivals, but the Sonata still has a comfortable ride. Sonata Cargo Space Cargo space is respectable in the Sonata, as it has a 16-cubic-foot trunk. That's in the middle of the pack among midsize cars, and it's plenty of room for the family's weekend luggage.