5 stars: Recommended to use this app in Japan than any other navigation app. Only in Japanese but easy to understand.
5 stars: precise in detail, synch great while driving
4 stars: Map rotation and route refreshing need to be improved. It's still slow
4 stars: Very good app
3 stars: The map is good , but i cannot rate it more than 3 stars unless English language support is added. It is only on Japanese and many people don't know Japanese , so if it have English and maybe Portuguese support few hundred thousand people more in japan will start to use it as well, and probably milions more around the globe , not only in Japan .
3 stars: No English version difficult to understand all is Kanji
2 stars: Good navigation app, but unsupported with Andro auto.
2 stars: Useless during long journey. Somehow stubborn and stupid route calculation
...