Overall, Kia has done a great job damping the noise and vibration that usually accompanies the cheapest small cars, and even over the coarsest road surfaces the cabin boom isn't excessive. Seat materials are unremarkable, and while there's definitely some hard plastic around the cabin, we couldn't find any ragged edges. One criticism: the engine can get a little thrashy when pushed into its upper revs, for a highway pass, for example.
Passenger space is abundant in the 2011 Kia Forte, thanks to a rather tall roof and wide body. Front seats aren't generously proportioned, but there's adequate headroom even with the sunroof for a 6'6" driver, with lots of legroom, and the backseat has plenty of space for two adults, three in a pinch—though legroom is limited. The 2011 Kia Forte Koup is an exception to that, though; the slightly different seating position makes headroom challenging with the sunroof especially. In either case, the trunk is huge.