The car is great I bought the car used with 7000 miles on it. I average about 23-27 MPG in town and 30-35 freeway but on one trip was averaging 40 mpg. I have had only one complaint and that is I got the Si which came with Michelin Pilot MXMA tires great tires but the soft rubber I had to replace within 20k miles not a big deal since they are a strictly sport tire not made for snow or rainy conditions. So I got a all season sport tire and no problems. I would definitely recommend this car as only maintenance I have done is oil changes and I've had no problems.
Has great power my buddy just got a new Pontiac Solstice "Not the GXP"and cant keep up with the civic Si, added a full exhaust cold air intake and reprogrammed chip and am now pushing 231 HP and 168 torque on the Dyno
Only thing I don't like is not made for a very tall person I'm 6'2" but still wish I had more leg room on driver's side.