I've owned the Si for a year now, and its been a great ride. I love the car more now than when purchased it. Build quality is unbelievablet; interior quality is phenomenal(still not a SINGLE rattle!), and the exterior body panels fit so tightly that they are near seamless. The suspension and handling show their European origin (Si's are built in England). The stiff suspension, tight steering and solid chassis make for a remarkably stable ride. The hatch is very useful, and the interior is roomy. The car may appear funky in pictures, but its great in person. Sure, it's not a bling-bling, super sexy, gimmicky car... but it IS a great car. I couldn't be happier with my purchase.
This car is just amazingly solid. Easily worth the extra bucks over a lower model Civic. Exceeds build quality of near competitors. Handles great. Cold A/C, heater gets hot fast. Engine sounds like a whirring mechanical marvel, exhaust note is quiet but deep. Seats are extremely comfortable.
Tough to say. Factory airbox is very restrictive (to satisfy more conservative drivers). Side view mirrors create some wind noise. Not too fond of appearance of 04 tail lights. I can't think of a single major flaw.