Getting warmer here...finally got the A/C going. Very anemic...worse than the Fit haha. Might be one of the wimpiest A/C units I've ever used in a car! Strangely, however, I am now getting 35 MPG with the A/C on (same daily route, about 4 weeks into driving it with about 1700 miles so far)...I figured the A/C would suck out a lot more MPG than the heater would, but apparently the systems are reversed on the 2013 Civic - I get 30/31 with the heater on, and 34/35 with the A/C on. Go figure.
I also definitely notice a power hit with the A/C on, especially with Eco Mode & the A/C on...feels like there's a sponge under the gas pedal preventing you from accelerating. Scared the crud out of me when I was trying to take my 3-lane quick merge home the other day...I just couldn't get the power I needed to hop through traffic until I popped Eco mode off, and then even better after I turned down the A/C. The combination of A/C & Eco Mode really sucks the acceleration power out of the car.
Still getting the weird micro-vibrations at around 70 MPH. Also has a bit of a bob on the highway due to the size...I miss driving my Kia Soul, which was extremely solid on the highway. But the Civic is a lot smoother all around and has surprisingly comfortable seats, so I can't complain too much