We are up to about 20k miles in our Insight now and still getting 45-50mpg with no issues. My wife uses it as her daily driver and loves it. We will never sell this car - so much space, practicality, and fuel economy for the price.
Gas mileage, interior materials quality and space, reliability. Room in the back for a rear facing carseat, but as with most compact cars it sacrifices legroom for the front passenger.
I don't really like driving it due to the lack of cruise control but that's what we get for buying the LX. Handling can be scary above 75mph, especially if it's windy. I like to drive fast and it'll still do 45mpg at 80mph.
† Edmunds.com received the highest numerical score in the proprietary J.D. Power 2014 Third-Party Automotive Website Evaluation Study℠. Results based on responses from 3,381 responses, measuring 14 companies and measures third-party automotive website usefulness among new and used vehicle shoppers. Proprietary study results are based on experiences and perceptions of owners surveyed from January 2014. Your experiences may vary. Visit jdpower.com.