More than I ever imagined!!!!!!!!
I love it. I wanted one when they first came out, but I was a poor grad student back then. 2 Civics later (200 and 2004) I have my Insight (and the 2004 Civic)
As I do not drive much on the highway my mpg and lifetime is not as high as others, but overall, 850 miles, got gas for the 2nd time today, no complaints!