The best 'hidden' feature I have come across is the incredible gas mileage you can get with the car, and and how easy it is to get it. I have only had my HCH2 a couple of weeks, driven a few of hundred miles, and am averaging over 60+mpg thanks to the numerous driving tips from this site. We also have a Prius, and with very, very carefull driving can get high numbers, but it is much easier with the Honda.