Standard sport-bolstered seats in either WRX or STI models are comfortable and supportive, but the optional Alcantara-surfaced Recaros available in the STI are a great upgrade, enhancing the cabin with a racier look and more comfort, too.
Cargo space in general is a reminder that the Impreza the WRX and STI were based on wasn't a large car. The hatchback is slightly shorter than the sedan, and despite the hatch cargo area, doesn't hold an abundant amount of gear. The sedan's trunk isn't perfect, either, due to a sloped, uneven floor.
Materials, fit, and finish are generally good, particularly in the price range of the WRX. With the available Limited package, both WRX and STI are upgradable to much more luxurious--though still not quite luxury--accommodations.
Both models also handle bumps well, though some will find the STI's ride too harsh. Stiffer springs, lower-profile tires, and a preference for performance over comfort are the contributing factors. Noise isn't bad in either car, with some slight engine noise and wind roar from the side mirrors the most noticeable elements.