My friend has the Fit and its pretty nice but mileage is not even close to my Yaris, his roommate's '08 Civic does better. We live down the street from each other and work together so the commute is the same.
Almost forgot I rented a Versa for about 3 1/2 weeks (some lady hit my car) and I liked the power but was unhappy with the mpg.
http://www.fueleconomy.gov/Feg/best/bestworstNF.shtml