OK, I'll admit, the sticker mpg of 47 highway is high - I usually get about 40mpg on the highway setting the cruise at 70. And the pick-up is a little slow (I used to have a 6 cyl, so it's an adjustment). In town (which is most of my driving anyway to work/school) I get 47/48 mpg, which is fantastic, and I still love how it "shuts off" at stoplights -all my friends just think this is the coolest. Sure, if money is the only reason you're buying, you'll probably never make up the cost unless gas reaches $5 a gallon, but if you want a reliable car that's easier on the environment and still nice on the pocketbook (a $30 fill up lasts me well over a month) this car is for you.
Gas mileage, of course. Plus Civics in general are just fun to zip around in!
There's only two things that could make it better: (1) being US- made (I live in Michigan, this is an issue) and (2) the silver metal around the gear shift reflects the sun RIGHT into my eyes sometimes - colored plastic, though not as pretty, would be better