This car is strictly fun to drive. You can drive it "soft" if you want to, or rev it up all the way to 8000 RPMs and fly around the corners. Easy maneuvering, great road grip, and I think relatively quiet for a "sports" car.
My 2008 Civic Si Coupe was a great car; but it was just a college car. It was fast, quick on its feet, had an amazing audio system, and popular with the teenage and young-twenties crowd, but it always felt unrefined. The engine provides a surprising bit of power, but only high in the rpm's, and had no down-low power. Driving it in stop-and-go traffic was a chore due to very low torque, but once you got in the 6,000 to 8,000 rpm range, it FLEW. This car is an amazing college vehicle, especially with the standard sunroof and subwoofer, but it's just unrefined. Lots of wind noise, road bumps, and interior quality hiccups (such as a ticking CD-player) prevent it from being a "professional" car.
Great little all around car. So far I've driven 8000 km. What I love most is the engine and super smooth clutch and transmission. The I-vtec is peppy paired with limited slip diff and summer tires. It loves high rpm reminds me of a sport bike. Car handles very well with little body roll. Makes an excellent commuter car if your looking for something more fun to drive than your typical Civic dx/lx/ex etc. It needs 91oct and I've been averaging 28-29 mpg mostly highway driving somewhat aggressive. The car looks great cosmetically in coupe form compared to other cars in its class. But lacks acceleration to keep up with its competition.
The Civic Si Sedan is probably the best combination of sport and practicality available. It combines a race-worthy 2.0L with the best shifter/clutch I've ever used. This car feels more upscale than my 2003 RSX-S was and performs at least as well. I get 27-33 mpg depending on city/hwy mix and am almost always speeding. Nice interior layout and materials.