The 2010 Subaru Impreza WRX and STI score well when it comes to versatility and passenger room, but a few of the reviews read by TheCarConnection.com note some materials quality issues.
Both the sedan and hatchback versions of the Subaru Impreza WRX and STI offer seating for five, though larger adults may find long trips a bit of a struggle. Jalopnik reviewers claim that the Subaru Impreza WRX's "Alcantara-covered Recaro seats look great and feel better, and any true driver's car that can accommodate four adults in comfort is a winner in our book." Edmunds similarly notes that "front seating is pleasantly comfortable, even during long stints behind the wheel" of the Subaru Impreza WRX STI. In back, Edmunds reports that "the seats provide ample headroom.”
In addition to a comfortable cabin, the 2010 Subaru Impreza WRX and STI boast a respectable amount of usable cargo room—on the hatchbacks, at least. Car and Driver finds that the Subaru Impreza WRX STI is "a practical hatchback packed in flaring fenders," with Cars.com mentioning the available "19 cubic feet" of cargo space, which is "competitive with the competition." However, for those sticking with the rather mundane-looking Subaru Impreza WRX sedan, Edmunds warns that "in terms of cargo space, the WRX comes up short—not just because of the fairly small trunk (10 cubic feet), but due to an uneven and sloped floor." In addition to the rear storage space, both versions of the Subaru Impreza WRX offer a small amount of interior storage, although ConsumerGuide notes that "interior storage is poor with a small center console and just average glovebox and door map pockets."
One area where Subaru has traditionally trailed its competitors is in terms of materials quality. While most reviewers appreciate the improvements made—especially with the WRX's 2008 redesign—Edmunds cautions that, "upon closer inspection, the plastic surfaces (which have the appearance of softer-touch materials) are actually textured hard plastic that seems to amplify the relatively low amount of road noise." Cars.com also reports that the Subaru Impreza WRX STI and regular WRX feature "relatively Spartan cabins with decent but not great materials quality." Finally, ConsumerGuide points out that, "while the materials look nice and show good assembly quality, they're comprised mainly of cheap feeling, hard plastic."
On the positive side, as some of the reviews have shown, overall assembly quality is fine on the Subaru Impreza WRX and STI. However, that's not necessarily reflected in terms of road noise. ConsumerGuide reviewers note that "the hatchback is particularly susceptible to wind, road, and bump noise."