 I just passed 37000 miles.  I drive fast, 80+ on the interstate and still average 37 mpg.  Only complaints, the navigation programming is poor and the indicated MPG is usually one or two MPG better than actual.  Otherwise, great car, especially in heavy rain.  The added weight of the electric motor and battery makes this thing track like a tank.  Great car overall.  I expect to drive it for years to come.