Just had the opportunity to take a 750 mile trip in my JX that I purchased in February. I was very dissappointed in the Navigation System. It took me out of my way about 75 miles to my destination on the way going. I brought my $179 portable Garmin and used it on the way back. It took me on the routed that I thought was best. The factory nav didn't even recognize the state highway that I was traveling. Everything else was good. Gas mileage averaged 22.5 mpg.