The crappiest GPS in my experience. Tip to foreigners renting cars in Japan. Avoid Nippon Rentacar. They have the most offices and aren't too expensive, but their GPS units totally suck. I had the hardest problems enterring addresses, it was horribly slow, and also ignorant of many of the new roads on which I would drive. Luckily I had my Shikoku Mapple 中国・四国マップルリング and Garmin GPS with me. Having a second and third opinion helped out a lot.