I got a fully loaded version about a mopnth ago. Gas mileage so far is 33.6 MPG, consistent with what they publish. Having the gas engine cut out at low MPH takes some getting used to but the car still has good acceleration (consider it has more HP than the V4 Altima). Also is a very comfortable ride and looks sharp. Not only is it better for the environment, but the cash rebate makes it comparable in $ to a similarly equipped V4 and with the tax credit of $2,350 and the better fuel efficiency, this seems like a much better deal.
Love the music box, I've loaded about 800 songs so far and am now adding songs to various play lists by playing random and tagging what I like the most (very easy). GPS is easy to use, and bluetooth functionality is very convenient.
Having memory settings would be nice, more storage space (probably difficult to do because of the battery) and a more powerful electric motor would be nice, usually the gas motor has to kick in at around 35-40 MPH even if you're just coasting.