Have one since October 2013 (65K). There was a service campaign for a firmware update of the Valvematic, like for the CVT. Never encounter a problem, most trouble free car I've ever owned. Theorically, the EPA rating difference is 2 mpg for the base LE Eco (less, if it's a LE Eco plus or premium, because of bigger wheels) but, as we say, mileage will vary so see if it worth it for you. Personally I found the Valvematic is particulary brillant on highway (50+ easy).